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Commit | Line | Data |
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d7b42618 | 1 | ; Options for the language- and target-independent parts of the compiler. |
50431bc4 | 2 | |
5e46b0c6 | 3 | ; Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
28a08168 | 4 | ; Free Software Foundation, Inc. |
d7b42618 NB |
5 | ; |
6 | ; This file is part of GCC. | |
7 | ; | |
8 | ; GCC is free software; you can redistribute it and/or modify it under | |
9 | ; the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 10 | ; Software Foundation; either version 3, or (at your option) any later |
d7b42618 | 11 | ; version. |
c22cacf3 | 12 | ; |
d7b42618 NB |
13 | ; GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | ; WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | ; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | ; for more details. | |
c22cacf3 | 17 | ; |
d7b42618 | 18 | ; You should have received a copy of the GNU General Public License |
9dcd6f09 NC |
19 | ; along with GCC; see the file COPYING3. If not see |
20 | ; <http://www.gnu.org/licenses/>. | |
d7b42618 | 21 | |
71733172 | 22 | ; See the GCC internals manual (options.texi) for a description of this file's format. |
d7b42618 NB |
23 | |
24 | ; Please try to keep this file in ASCII collating order. | |
25 | ||
e90afde6 JM |
26 | Variable |
27 | int target_flags | |
28 | ||
46625112 JM |
29 | Variable |
30 | int optimize | |
31 | ||
32 | Variable | |
33 | int optimize_size | |
34 | ||
0a8134ca JM |
35 | ; Not used directly to control optimizations, only to save -Ofast |
36 | ; setting for "optimize" attributes. | |
37 | Variable | |
38 | int optimize_fast | |
39 | ||
a75bfaa6 JM |
40 | ; 0 means straightforward implementation of complex divide acceptable. |
41 | ; 1 means wide ranges of inputs must work for complex divide. | |
42 | ; 2 means C99-like requirements for complex multiply and divide. | |
43 | Variable | |
44 | int flag_complex_method = 1 | |
45 | ||
46 | ; Nonzero if subexpressions must be evaluated from left-to-right. | |
47 | Variable | |
48 | int flag_evaluation_order = 0 | |
49 | ||
a75bfaa6 JM |
50 | ; Language specific warning pass for unused results. |
51 | Variable | |
52 | bool flag_warn_unused_result = false | |
53 | ||
48476d13 JM |
54 | Variable |
55 | int *param_values | |
56 | ||
d5478783 JM |
57 | ; Nonzero if we should write GIMPLE bytecode for link-time optimization. |
58 | Variable | |
59 | int flag_generate_lto | |
60 | ||
61 | ; True to warn about any objects definitions whose size is larger | |
62 | ; than N bytes. Also want about function definitions whose returned | |
63 | ; values are larger than N bytes, where N is 'larger_than_size'. | |
64 | Variable | |
65 | bool warn_larger_than | |
66 | ||
67 | Variable | |
68 | HOST_WIDE_INT larger_than_size | |
69 | ||
70 | ; True to warn about any function whose frame size is larger | |
71 | ; than N bytes. | |
72 | Variable | |
73 | bool warn_frame_larger_than | |
74 | ||
75 | Variable | |
76 | HOST_WIDE_INT frame_larger_than_size | |
77 | ||
78 | ; Nonzero means we should be saving declaration info into a .X file. | |
79 | Variable | |
80 | int flag_gen_aux_info = 0 | |
81 | ||
82 | ; Nonzero if we are compiling code for a shared library, zero for | |
83 | ; executable. | |
84 | Variable | |
85 | int flag_shlib | |
86 | ||
6a1f6c9c JM |
87 | ; These two are really VEC(char_p,heap) *. |
88 | ||
89 | Variable | |
90 | void *flag_instrument_functions_exclude_functions | |
91 | ||
92 | Variable | |
93 | void *flag_instrument_functions_exclude_files | |
94 | ||
69ccdddb JM |
95 | ; Generic structs (e.g. templates not explicitly specialized) |
96 | ; may not have a compilation unit associated with them, and so | |
97 | ; may need to be treated differently from ordinary structs. | |
98 | ; | |
99 | ; Structs only handled by reference (indirectly), will also usually | |
100 | ; not need as much debugging information. | |
101 | ||
102 | Variable | |
103 | enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
104 | ||
105 | Variable | |
106 | enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS] = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY } | |
107 | ||
0576d21f JM |
108 | ; True if we should exit after parsing options. |
109 | Variable | |
110 | bool exit_after_options | |
111 | ||
112 | ; Type(s) of debugging information we are producing (if any). See | |
113 | ; flag-types.h for the definitions of the different possible types of | |
114 | ; debugging information. | |
115 | Variable | |
116 | enum debug_info_type write_symbols = NO_DEBUG | |
117 | ||
118 | ; Level of debugging information we are producing. See flag-types.h | |
119 | ; for the definitions of the different possible levels. | |
120 | Variable | |
121 | enum debug_info_levels debug_info_level = DINFO_LEVEL_NONE | |
122 | ||
123 | ; Nonzero means use GNU-only extensions in the generated symbolic | |
124 | ; debugging information. Currently, this only has an effect when | |
125 | ; write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. | |
126 | Variable | |
127 | bool use_gnu_debug_info_extensions | |
128 | ||
299404a1 JM |
129 | ; Original value of maximum field alignment in bytes, specified via |
130 | ; -fpack-struct=<value>. | |
131 | Variable | |
132 | unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT | |
133 | ||
7cd23050 JM |
134 | Variable |
135 | enum vect_verbosity_levels user_vect_verbosity_level = MAX_VERBOSITY_LEVEL | |
136 | ||
5e471ea6 JM |
137 | ; Type of stack check. |
138 | Variable | |
139 | enum stack_check_type flag_stack_check = NO_STACK_CHECK | |
140 | ||
299404a1 JM |
141 | ; -dA causes debug commentary information to be produced in |
142 | ; the generated assembly code (to make it more readable). This option | |
143 | ; is generally only of use to those who actually need to read the | |
144 | ; generated assembly code (perhaps while debugging the compiler itself). | |
145 | ; Currently, this switch is only used by dwarf2out.c; however, it is intended | |
146 | ; to be a catchall for printing debug information in the assembler file. | |
147 | Variable | |
148 | int flag_debug_asm | |
149 | ||
150 | ; -dP causes the rtl to be emitted as a comment in assembly. | |
151 | Variable | |
152 | int flag_dump_rtl_in_asm | |
153 | ||
154 | ; Whether -da was passed (used only in handle_common_deferred_options). | |
155 | Variable | |
156 | bool flag_dump_all_passed | |
157 | ||
158 | ; Other flags saying which kinds of debugging dump have been requested. | |
159 | ||
160 | Variable | |
161 | int rtl_dump_and_exit | |
162 | ||
163 | Variable | |
164 | int flag_print_asm_name | |
165 | ||
166 | Variable | |
167 | enum graph_dump_types graph_dump_format = no_graph | |
168 | ||
a803773f JM |
169 | ; Name of top-level original source file (what was input to cpp). |
170 | ; This comes from the #-command at the beginning of the actual input. | |
171 | ; If there isn't any there, then this is the cc1 input file name. | |
172 | Variable | |
173 | const char *main_input_filename | |
174 | ||
175 | ; Pointer to base name in main_input_filename, with directories and a | |
176 | ; single final extension removed, and the length of this base | |
177 | ; name. | |
178 | ||
179 | Variable | |
180 | const char *main_input_basename | |
181 | ||
182 | Variable | |
183 | int main_input_baselength | |
184 | ||
299404a1 JM |
185 | ; Which options have been printed by --help. |
186 | Variable | |
187 | char *help_printed | |
188 | ||
e6d4b984 JM |
189 | ; Which enums have been printed by --help. 0 = not printed, no |
190 | ; relevant options seen, 1 = relevant option seen, not yet printed, 2 | |
191 | ; = printed. | |
192 | Variable | |
193 | char *help_enum_printed | |
194 | ||
299404a1 JM |
195 | ; The number of columns for --help output. |
196 | Variable | |
197 | unsigned int help_columns | |
198 | ||
199 | ; Whether this options structure has been through finish_options | |
200 | Variable | |
201 | bool flag_opts_finished | |
202 | ||
603349bf JM |
203 | ### |
204 | Driver | |
205 | ||
e200444e JM |
206 | -assemble |
207 | Driver Alias(S) | |
208 | ||
209 | -compile | |
210 | Driver Alias(c) | |
211 | ||
212 | -coverage | |
213 | Driver Alias(coverage) | |
214 | ||
215 | -debug | |
216 | Common Alias(g) | |
217 | ||
218 | -dump | |
219 | Common Separate Alias(d) | |
220 | ||
221 | -dump= | |
222 | Common Joined Alias(d) | |
223 | ||
224 | -dumpbase | |
225 | Common Separate Alias(dumpbase) | |
226 | ||
227 | -dumpdir | |
228 | Common Separate Alias(dumpdir) | |
229 | ||
230 | -entry | |
231 | Driver Separate Alias(e) | |
232 | ||
233 | -entry= | |
234 | Driver Joined Alias(e) | |
235 | ||
236 | -extra-warnings | |
237 | Common Warning Alias(Wextra) | |
238 | ||
239 | -for-assembler | |
240 | Driver Separate Alias(Xassembler) | |
241 | ||
242 | -for-assembler= | |
243 | Driver JoinedOrMissing Alias(Xassembler) | |
244 | ||
245 | -for-linker | |
246 | Driver Separate Alias(Xlinker) | |
247 | ||
248 | -for-linker= | |
249 | Driver JoinedOrMissing Alias(Xlinker) | |
250 | ||
251 | -force-link | |
252 | Driver Separate Alias(u) | |
253 | ||
254 | -force-link= | |
255 | Driver Joined Alias(u) | |
256 | ||
d185d268 | 257 | -help |
e200444e | 258 | Common Driver Var(help_flag) |
cf03fd63 | 259 | Display this information |
d185d268 | 260 | |
c662432e | 261 | -help= |
603349bf | 262 | Common Driver Report Joined |
c662432e | 263 | --help=<class> Display descriptions of a specific class of options. <class> is one or more of optimizers, target, warnings, undocumented, params |
903caebf | 264 | |
e200444e JM |
265 | -language |
266 | Driver Separate Alias(x) | |
267 | ||
268 | -language= | |
269 | Driver Joined Alias(x) | |
270 | ||
271 | -library-directory | |
272 | Driver Separate Alias(L) | |
273 | ||
274 | -library-directory= | |
275 | Driver Joined Alias(L) | |
276 | ||
277 | -no-canonical-prefixes | |
278 | Driver Alias(no-canonical-prefixes) | |
279 | ||
280 | -no-standard-libraries | |
281 | Driver Alias(nostdlib) | |
282 | ||
283 | -no-warnings | |
284 | Common Alias(w) | |
285 | ||
286 | -optimize | |
287 | Common Alias(O) | |
288 | ||
289 | -output | |
290 | Common Driver Separate Alias(o) MissingArgError(missing filename after %qs) | |
291 | ||
292 | -output= | |
293 | Common Driver Joined Alias(o) MissingArgError(missing filename after %qs) | |
294 | ||
295 | -pass-exit-codes | |
296 | Driver Alias(pass-exit-codes) | |
297 | ||
298 | -pedantic | |
299 | Common Alias(pedantic) | |
300 | ||
301 | -pedantic-errors | |
302 | Common Alias(pedantic-errors) | |
303 | ||
304 | -pie | |
305 | Common Alias(pie) | |
306 | ||
307 | -pipe | |
308 | Driver Alias(pipe) | |
309 | ||
310 | -prefix | |
311 | Driver Separate Alias(B) | |
312 | ||
313 | -prefix= | |
314 | Driver JoinedOrMissing Alias(B) | |
315 | ||
316 | -preprocess | |
317 | Driver Alias(E) | |
318 | ||
319 | -print-file-name | |
320 | Driver Separate Alias(print-file-name=) | |
321 | ||
322 | -print-file-name= | |
323 | Driver JoinedOrMissing Alias(print-file-name=) | |
324 | ||
325 | -print-libgcc-file-name | |
326 | Driver Alias(print-libgcc-file-name) | |
327 | ||
328 | -print-multi-directory | |
329 | Driver Alias(print-multi-directory) | |
330 | ||
331 | -print-multi-lib | |
332 | Driver Alias(print-multi-lib) | |
333 | ||
334 | -print-multi-os-directory | |
335 | Driver Alias(print-multi-os-directory) | |
336 | ||
337 | -print-prog-name | |
338 | Driver Separate Alias(print-prog-name=) | |
339 | ||
340 | -print-prog-name= | |
341 | Driver JoinedOrMissing Alias(print-prog-name=) | |
342 | ||
343 | -print-search-dirs | |
344 | Driver Alias(print-search-dirs) | |
345 | ||
346 | -print-sysroot | |
347 | Driver Alias(print-sysroot) | |
348 | ||
349 | -print-sysroot-headers-suffix | |
350 | Driver Alias(print-sysroot-headers-suffix) | |
351 | ||
352 | -profile | |
353 | Common Alias(p) | |
354 | ||
355 | -save-temps | |
356 | Driver Alias(save-temps) | |
357 | ||
358 | -shared | |
359 | Common Alias(shared) | |
360 | ||
361 | -specs | |
362 | Driver Separate Alias(specs=) | |
363 | ||
364 | -specs= | |
365 | Driver Joined Alias(specs=) | |
366 | ||
367 | -static | |
368 | Driver Alias(static) | |
369 | ||
370 | -symbolic | |
371 | Driver Alias(symbolic) | |
372 | ||
d185d268 | 373 | -target-help |
603349bf | 374 | Common Driver |
c662432e NC |
375 | Alias for --help=target |
376 | ||
e200444e JM |
377 | -time |
378 | Driver Alias(time) | |
379 | ||
380 | -verbose | |
381 | Driver Alias(v) | |
382 | ||
383 | ;; The driver used to convert options such as --help into forms such | |
384 | ;; as -fhelp; the following four entries are for compatibility with | |
385 | ;; any direct uses of those (undocumented) -f forms | |
c662432e | 386 | fhelp |
e200444e | 387 | Common Driver Alias(-help) |
c662432e NC |
388 | |
389 | fhelp= | |
e200444e | 390 | Common Driver Joined Alias(-help=) |
c662432e NC |
391 | |
392 | ftarget-help | |
e200444e | 393 | Common Driver Alias(-target-help) |
c662432e | 394 | |
41fd0f9b | 395 | fversion |
e200444e | 396 | Common Driver Alias(-version) |
41fd0f9b | 397 | |
c662432e NC |
398 | -param |
399 | Common Separate | |
400 | --param <param>=<value> Set parameter <param> to value. See below for a complete list of parameters | |
d185d268 | 401 | |
e200444e JM |
402 | -param= |
403 | Common Joined Alias(-param) | |
404 | ||
405 | -sysroot | |
406 | Driver Separate Alias(-sysroot=) | |
407 | ||
603349bf JM |
408 | -sysroot= |
409 | Driver JoinedOrMissing | |
410 | ||
d185d268 | 411 | -version |
603349bf JM |
412 | Common Driver |
413 | ||
414 | B | |
415 | Driver Joined Separate | |
416 | ||
417 | E | |
418 | Driver | |
d185d268 | 419 | |
d9d16a19 JM |
420 | L |
421 | Driver Joined Separate | |
422 | ||
dd9f93dc JM |
423 | N |
424 | Driver | |
425 | ||
903caebf | 426 | O |
ab442df7 | 427 | Common JoinedOrMissing Optimization |
cf03fd63 | 428 | -O<number> Set optimization level to <number> |
903caebf NB |
429 | |
430 | Os | |
ab442df7 | 431 | Common Optimization |
cf03fd63 | 432 | Optimize for space rather than speed |
903caebf | 433 | |
be6d3f0e RG |
434 | Ofast |
435 | Common Optimization | |
436 | Optimize for speed disregarding exact standards compliance | |
437 | ||
dd9f93dc JM |
438 | Q |
439 | Driver | |
440 | ||
441 | Qn | |
442 | Driver Negative(Qy) | |
443 | ||
444 | Qy | |
445 | Driver Negative(Qn) | |
446 | ||
6d721f67 JM |
447 | R |
448 | Driver Joined Separate | |
449 | ||
603349bf JM |
450 | S |
451 | Driver | |
452 | ||
6d721f67 JM |
453 | T |
454 | Driver Joined Separate | |
455 | ||
456 | Tbss | |
457 | Driver Separate | |
458 | ||
459 | Tdata | |
460 | Driver Separate | |
461 | ||
462 | Ttext | |
463 | Driver Separate | |
464 | ||
903caebf | 465 | W |
5de8299c | 466 | Common RejectNegative Warning Alias(Wextra) |
28786366 | 467 | This switch is deprecated; use -Wextra instead |
903caebf | 468 | |
603349bf JM |
469 | Wa, |
470 | Driver JoinedOrMissing | |
471 | ||
472 | Wl, | |
473 | Driver JoinedOrMissing | |
474 | ||
475 | Wp, | |
476 | Driver JoinedOrMissing | |
477 | ||
e01cc6dc | 478 | Waggregate-return |
c662432e | 479 | Common Var(warn_aggregate_return) Warning |
28786366 | 480 | Warn about returning structures, unions or arrays |
e01cc6dc | 481 | |
590b1f2d | 482 | Warray-bounds |
21af5cdf | 483 | Common Var(warn_array_bounds) Warning |
590b1f2d DM |
484 | Warn if an array is accessed out of bounds |
485 | ||
5c498b10 | 486 | Wattributes |
c662432e | 487 | Common Var(warn_attributes) Init(1) Warning |
5c498b10 DD |
488 | Warn about inappropriate attribute usage |
489 | ||
e01cc6dc | 490 | Wcast-align |
c662432e | 491 | Common Var(warn_cast_align) Warning |
28786366 | 492 | Warn about pointer casts which increase alignment |
e01cc6dc | 493 | |
87cf0651 SB |
494 | Wcpp |
495 | Common Var(warn_cpp) Init(1) Warning | |
496 | Warn when a #warning directive is encountered | |
497 | ||
e01cc6dc | 498 | Wdeprecated-declarations |
c662432e | 499 | Common Var(warn_deprecated_decl) Init(1) Warning |
28786366 | 500 | Warn about uses of __attribute__((deprecated)) declarations |
e01cc6dc NB |
501 | |
502 | Wdisabled-optimization | |
c662432e | 503 | Common Var(warn_disabled_optimization) Warning |
28786366 | 504 | Warn when an optimization pass is disabled |
e01cc6dc NB |
505 | |
506 | Werror | |
50431bc4 | 507 | Common Var(warnings_are_errors) |
28786366 | 508 | Treat all warnings as errors |
e01cc6dc | 509 | |
79cf5994 DD |
510 | Werror= |
511 | Common Joined | |
512 | Treat specified warning as error | |
513 | ||
903caebf | 514 | Wextra |
62a67c94 | 515 | Common Var(extra_warnings) Warning |
cf03fd63 | 516 | Print extra (possibly unwanted) warnings |
903caebf | 517 | |
c65a01af | 518 | Wfatal-errors |
50431bc4 | 519 | Common Var(flag_fatal_errors) |
c65a01af RG |
520 | Exit on the first error occurred |
521 | ||
a214518f SP |
522 | Wframe-larger-than= |
523 | Common RejectNegative Joined UInteger | |
f94e1d66 | 524 | -Wframe-larger-than=<number> Warn if a function's stack frame requires more than <number> bytes |
a214518f | 525 | |
e01cc6dc | 526 | Winline |
c662432e | 527 | Common Var(warn_inline) Warning |
28786366 | 528 | Warn when an inlined function cannot be inlined |
e01cc6dc NB |
529 | |
530 | Wlarger-than- | |
5de8299c | 531 | Common RejectNegative Joined Warning Undocumented Alias(Wlarger-than=) |
e8fc888d MLI |
532 | |
533 | Wlarger-than= | |
534 | Common RejectNegative Joined UInteger Warning | |
535 | -Wlarger-than=<number> Warn if an object is larger than <number> bytes | |
e01cc6dc | 536 | |
f9cc1a70 | 537 | Wunsafe-loop-optimizations |
c662432e | 538 | Common Var(warn_unsafe_loop_optimizations) Warning |
f9cc1a70 PB |
539 | Warn if the loop cannot be optimized due to nontrivial assumptions. |
540 | ||
e01cc6dc | 541 | Wmissing-noreturn |
c662432e | 542 | Common Var(warn_missing_noreturn) Warning |
28786366 | 543 | Warn about functions which might be candidates for __attribute__((noreturn)) |
e01cc6dc | 544 | |
7621f5d5 VR |
545 | Wmudflap |
546 | Common Var(warn_mudflap) Init(1) Warning | |
547 | Warn about constructs not instrumented by -fmudflap | |
548 | ||
71834ad3 | 549 | Woverflow |
c662432e | 550 | Common Var(warn_overflow) Init(1) Warning |
71834ad3 RS |
551 | Warn about overflow in arithmetic expressions |
552 | ||
e01cc6dc | 553 | Wpacked |
c662432e | 554 | Common Var(warn_packed) Warning |
28786366 | 555 | Warn when the packed attribute has no effect on struct layout |
e01cc6dc NB |
556 | |
557 | Wpadded | |
c662432e | 558 | Common Var(warn_padded) Warning |
28786366 | 559 | Warn when padding is required to align structure members |
e01cc6dc NB |
560 | |
561 | Wshadow | |
c662432e | 562 | Common Var(warn_shadow) Warning |
28786366 | 563 | Warn when one local variable shadows another |
e01cc6dc | 564 | |
7d69de61 | 565 | Wstack-protector |
c662432e | 566 | Common Var(warn_stack_protect) Warning |
7d69de61 RH |
567 | Warn when not issuing stack smashing protection for some reason |
568 | ||
e01cc6dc | 569 | Wstrict-aliasing |
c662432e | 570 | Common Warning |
28786366 | 571 | Warn about code which might break strict aliasing rules |
e01cc6dc | 572 | |
5399d643 | 573 | Wstrict-aliasing= |
fcfbd84e | 574 | Common Joined RejectNegative UInteger Var(warn_strict_aliasing) Init(-1) Warning |
5399d643 JW |
575 | Warn about code which might break strict aliasing rules |
576 | ||
6ac01510 | 577 | Wstrict-overflow |
21af5cdf | 578 | Common Warning |
6ac01510 ILT |
579 | Warn about optimizations that assume that signed overflow is undefined |
580 | ||
581 | Wstrict-overflow= | |
fcfbd84e | 582 | Common Joined RejectNegative UInteger Var(warn_strict_overflow) Init(-1) Warning |
6ac01510 ILT |
583 | Warn about optimizations that assume that signed overflow is undefined |
584 | ||
5dc16b19 MLI |
585 | Wsuggest-attribute=const |
586 | Common Var(warn_suggest_attribute_const) Warning | |
587 | Warn about functions which might be candidates for __attribute__((const)) | |
588 | ||
589 | Wsuggest-attribute=pure | |
590 | Common Var(warn_suggest_attribute_pure) Warning | |
591 | Warn about functions which might be candidates for __attribute__((pure)) | |
592 | ||
7ea6b6cf JH |
593 | Wsuggest-attribute=noreturn |
594 | Common Var(warn_suggest_attribute_noreturn) Warning | |
595 | Warn about functions which might be candidates for __attribute__((noreturn)) | |
596 | ||
e01cc6dc | 597 | Wswitch |
c662432e | 598 | Common Var(warn_switch) Warning |
28786366 | 599 | Warn about enumerated switches, with no default, missing a case |
e01cc6dc NB |
600 | |
601 | Wswitch-default | |
c662432e | 602 | Common Var(warn_switch_default) Warning |
28786366 | 603 | Warn about enumerated switches missing a \"default:\" statement |
e01cc6dc NB |
604 | |
605 | Wswitch-enum | |
c662432e | 606 | Common Var(warn_switch_enum) Warning |
28786366 | 607 | Warn about all enumerated switches missing a specific case |
e01cc6dc NB |
608 | |
609 | Wsystem-headers | |
c662432e | 610 | Common Var(warn_system_headers) Warning |
f3fdaec4 | 611 | Do not suppress warnings from system headers |
e01cc6dc | 612 | |
8ffadef9 MG |
613 | Wtrampolines |
614 | Common Var(warn_trampolines) Warning | |
615 | Warn whenever a trampoline is generated | |
616 | ||
faebccf9 DN |
617 | Wtype-limits |
618 | Common Var(warn_type_limits) Init(-1) Warning | |
619 | Warn if a comparison is always true or always false due to the limited range of the data type | |
620 | ||
e01cc6dc | 621 | Wuninitialized |
62a67c94 | 622 | Common Var(warn_uninitialized) Init(-1) Warning |
28786366 | 623 | Warn about uninitialized automatic variables |
e01cc6dc NB |
624 | |
625 | Wunreachable-code | |
2d2bd949 | 626 | Common Ignore |
bc3c12a2 | 627 | Does nothing. Preserved for backward compatibility. |
e01cc6dc | 628 | |
903caebf | 629 | Wunused |
e73f7547 | 630 | Common Var(warn_unused) Init(0) Warning |
cf03fd63 | 631 | Enable all -Wunused- warnings |
903caebf | 632 | |
ebfbbdc5 JJ |
633 | Wunused-but-set-parameter |
634 | Common Var(warn_unused_but_set_parameter) Init(-1) Warning | |
635 | Warn when a function parameter is only set, otherwise unused | |
636 | ||
637 | Wunused-but-set-variable | |
638 | Common Var(warn_unused_but_set_variable) Init(-1) Warning | |
639 | Warn when a variable is only set, otherwise unused | |
640 | ||
e01cc6dc | 641 | Wunused-function |
e73f7547 | 642 | Common Var(warn_unused_function) Init(-1) Warning |
28786366 | 643 | Warn when a function is unused |
e01cc6dc NB |
644 | |
645 | Wunused-label | |
e73f7547 | 646 | Common Var(warn_unused_label) Init(-1) Warning |
28786366 | 647 | Warn when a label is unused |
e01cc6dc NB |
648 | |
649 | Wunused-parameter | |
e73f7547 | 650 | Common Var(warn_unused_parameter) Init(-1) Warning |
28786366 | 651 | Warn when a function parameter is unused |
e01cc6dc NB |
652 | |
653 | Wunused-value | |
e73f7547 | 654 | Common Var(warn_unused_value) Init(-1) Warning |
28786366 | 655 | Warn when an expression value is unused |
e01cc6dc NB |
656 | |
657 | Wunused-variable | |
e73f7547 | 658 | Common Var(warn_unused_variable) Init(-1) Warning |
28786366 | 659 | Warn when a variable is unused |
e01cc6dc | 660 | |
16c1c158 | 661 | Wcoverage-mismatch |
650cfcab NV |
662 | Common Var(warn_coverage_mismatch) Init(1) Warning |
663 | Warn in case profiles in -fprofile-use do not match | |
16c1c158 | 664 | |
603349bf JM |
665 | Xassembler |
666 | Driver Separate | |
667 | ||
668 | Xlinker | |
669 | Driver Separate | |
670 | ||
671 | Xpreprocessor | |
672 | Driver Separate | |
673 | ||
dd9f93dc JM |
674 | Z |
675 | Driver | |
676 | ||
d185d268 | 677 | aux-info |
d5478783 | 678 | Common Separate Var(aux_info_file_name) |
cf03fd63 | 679 | -aux-info <file> Emit declaration information into <file> |
d185d268 NB |
680 | |
681 | aux-info= | |
5de8299c | 682 | Common Joined Alias(aux-info) |
d185d268 NB |
683 | |
684 | auxbase | |
d5478783 | 685 | Common Separate RejectDriver Var(aux_base_name) |
d185d268 NB |
686 | |
687 | auxbase-strip | |
603349bf JM |
688 | Common Separate RejectDriver |
689 | ||
e200444e JM |
690 | coverage |
691 | Driver | |
692 | ||
603349bf JM |
693 | c |
694 | Driver | |
d185d268 NB |
695 | |
696 | d | |
697 | Common Joined | |
cf03fd63 | 698 | -d<letters> Enable dumps from specific passes of the compiler |
d185d268 NB |
699 | |
700 | dumpbase | |
d5478783 | 701 | Common Separate Var(dump_base_name) |
cf03fd63 | 702 | -dumpbase <file> Set the file basename to be used for dumps |
d185d268 | 703 | |
d7fb0a6d | 704 | dumpdir |
d5478783 | 705 | Common Separate Var(dump_dir_name) |
316fc112 | 706 | -dumpdir <dir> Set the directory name to be used for dumps |
d7fb0a6d | 707 | |
603349bf JM |
708 | dumpmachine |
709 | Driver | |
710 | ||
711 | dumpspecs | |
712 | Driver | |
713 | ||
714 | dumpversion | |
715 | Driver | |
716 | ||
e200444e JM |
717 | e |
718 | Driver Joined Separate | |
719 | ||
fa381cb2 JM |
720 | ; This option has historically been passed down to the linker by an |
721 | ; accident of a %{e*} spec, so ensure it continues to be passed down | |
722 | ; as a single option. The supported option for this purpose is | |
723 | ; -rdynamic. See PR 47390. | |
724 | export-dynamic | |
725 | Driver Undocumented | |
726 | ||
31b66477 KC |
727 | ; The version of the C++ ABI in use. The following values are allowed: |
728 | ; | |
729 | ; 0: The version of the ABI believed most conformant with the C++ ABI | |
730 | ; specification. This ABI may change as bugs are discovered and fixed. | |
731 | ; Therefore, 0 will not necessarily indicate the same ABI in different | |
732 | ; versions of G++. | |
733 | ; | |
734 | ; 1: The version of the ABI first used in G++ 3.2. | |
735 | ; | |
abfe01ce JM |
736 | ; 2: The version of the ABI first used in G++ 3.4 (and current default). |
737 | ; | |
738 | ; 3: The version of the ABI that fixes the missing underscore | |
739 | ; in template non-type arguments of pointer type. | |
740 | ; | |
741 | ; 4: The version of the ABI that introduces unambiguous mangling of | |
55af847f | 742 | ; vector types. First selectable in G++ 4.5. |
99a8d35b | 743 | ; |
67e18edb | 744 | ; 5: The version of the ABI that ignores attribute const/noreturn |
55af847f | 745 | ; in function pointer mangling, and corrects mangling of decltype and |
67e18edb | 746 | ; function parameters used in other parameters and the return type. |
55af847f | 747 | ; First selectable in G++ 4.6. |
67e18edb | 748 | ; |
31b66477 KC |
749 | ; Additional positive integers will be assigned as new versions of |
750 | ; the ABI become the default version of the ABI. | |
57782ad8 | 751 | fabi-version= |
fcfbd84e | 752 | Common Joined RejectNegative UInteger Var(flag_abi_version) Init(2) |
57782ad8 | 753 | |
6ff3a151 | 754 | falign-functions |
ab442df7 | 755 | Common Report Var(align_functions,0) Optimization UInteger |
f3fdaec4 | 756 | Align the start of functions |
6ff3a151 | 757 | |
058de654 | 758 | falign-functions= |
d5478783 | 759 | Common RejectNegative Joined UInteger Var(align_functions) |
058de654 | 760 | |
6ff3a151 | 761 | falign-jumps |
ab442df7 | 762 | Common Report Var(align_jumps,0) Optimization UInteger |
f3fdaec4 | 763 | Align labels which are only reached by jumping |
6ff3a151 | 764 | |
058de654 | 765 | falign-jumps= |
d5478783 | 766 | Common RejectNegative Joined UInteger Var(align_jumps) |
058de654 | 767 | |
6ff3a151 | 768 | falign-labels |
ab442df7 | 769 | Common Report Var(align_labels,0) Optimization UInteger |
f3fdaec4 | 770 | Align all labels |
6ff3a151 | 771 | |
058de654 | 772 | falign-labels= |
d5478783 | 773 | Common RejectNegative Joined UInteger Var(align_labels) |
058de654 | 774 | |
6ff3a151 | 775 | falign-loops |
3020190e | 776 | Common Report Var(align_loops,0) Optimization UInteger |
f3fdaec4 | 777 | Align the start of loops |
6ff3a151 | 778 | |
058de654 | 779 | falign-loops= |
d5478783 | 780 | Common RejectNegative Joined UInteger Var(align_loops) |
058de654 | 781 | |
6ff3a151 | 782 | fargument-alias |
2d2bd949 | 783 | Common Ignore |
0d3c82d6 | 784 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
785 | |
786 | fargument-noalias | |
2d2bd949 | 787 | Common Ignore |
0d3c82d6 | 788 | Does nothing. Preserved for backward compatibility. |
6ff3a151 NB |
789 | |
790 | fargument-noalias-global | |
2d2bd949 | 791 | Common Ignore |
0d3c82d6 | 792 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 793 | |
0698a1d2 | 794 | fargument-noalias-anything |
2d2bd949 | 795 | Common Ignore |
0d3c82d6 | 796 | Does nothing. Preserved for backward compatibility. |
0698a1d2 | 797 | |
6ff3a151 | 798 | fasynchronous-unwind-tables |
c662432e | 799 | Common Report Var(flag_asynchronous_unwind_tables) Optimization |
f3fdaec4 | 800 | Generate unwind tables that are exact at each instruction boundary |
6ff3a151 | 801 | |
6fb5fa3c DB |
802 | fauto-inc-dec |
803 | Common Report Var(flag_auto_inc_dec) Init(1) | |
804 | Generate auto-inc/dec instructions | |
805 | ||
31b66477 KC |
806 | ; -fcheck-bounds causes gcc to generate array bounds checks. |
807 | ; For C, C++ and ObjC: defaults off. | |
808 | ; For Java: defaults to on. | |
809 | ; For Fortran: defaults to off. | |
6ff3a151 | 810 | fbounds-check |
50431bc4 | 811 | Common Report Var(flag_bounds_check) |
f3fdaec4 | 812 | Generate code to check bounds before indexing arrays |
6ff3a151 NB |
813 | |
814 | fbranch-count-reg | |
c662432e | 815 | Common Report Var(flag_branch_on_count_reg) Init(1) Optimization |
f3fdaec4 | 816 | Replace add, compare, branch with branch on count register |
6ff3a151 NB |
817 | |
818 | fbranch-probabilities | |
c662432e | 819 | Common Report Var(flag_branch_probabilities) Optimization |
f3fdaec4 | 820 | Use profiling information for branch probabilities |
6ff3a151 | 821 | |
de32c0cb | 822 | fbranch-target-load-optimize |
c662432e | 823 | Common Report Var(flag_branch_target_load_optimize) Optimization |
f3fdaec4 | 824 | Perform branch target load optimization before prologue / epilogue threading |
de32c0cb NB |
825 | |
826 | fbranch-target-load-optimize2 | |
c662432e | 827 | Common Report Var(flag_branch_target_load_optimize2) Optimization |
f3fdaec4 | 828 | Perform branch target load optimization after prologue / epilogue threading |
de32c0cb | 829 | |
1194fc79 | 830 | fbtr-bb-exclusive |
c662432e | 831 | Common Report Var(flag_btr_bb_exclusive) Optimization |
1194fc79 R |
832 | Restrict target load migration not to re-use registers in any basic block |
833 | ||
058de654 | 834 | fcall-saved- |
21bf1558 | 835 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 836 | -fcall-saved-<register> Mark <register> as being preserved across functions |
058de654 NB |
837 | |
838 | fcall-used- | |
21bf1558 | 839 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 840 | -fcall-used-<register> Mark <register> as being corrupted by function calls |
058de654 | 841 | |
31b66477 KC |
842 | ; Nonzero for -fcaller-saves: allocate values in regs that need to |
843 | ; be saved across function calls, if that produces overall better code. | |
844 | ; Optional now, so people can test it. | |
de32c0cb | 845 | fcaller-saves |
c662432e | 846 | Common Report Var(flag_caller_saves) Optimization |
f3fdaec4 | 847 | Save registers around function calls |
de32c0cb | 848 | |
3d8864c0 SP |
849 | fcheck-data-deps |
850 | Common Report Var(flag_check_data_deps) | |
851 | Compare the results of several data dependence analyzers. | |
852 | ||
ccaeeafe NC |
853 | fcombine-stack-adjustments |
854 | Common Report Var(flag_combine_stack_adjustments) Optimization | |
855 | Looks for opportunities to reduce stack adjustments and stack references. | |
856 | ||
6ff3a151 | 857 | fcommon |
c662432e | 858 | Common Report Var(flag_no_common,0) Optimization |
f3fdaec4 | 859 | Do not put uninitialized globals in the common section |
6ff3a151 | 860 | |
603349bf JM |
861 | fcompare-debug |
862 | Driver | |
863 | ; Converted by the driver to -fcompare-debug= options. | |
864 | ||
2153915d | 865 | fcompare-debug= |
603349bf | 866 | Common Driver JoinedOrMissing RejectNegative Var(flag_compare_debug_opt) |
f94e1d66 | 867 | -fcompare-debug[=<opts>] Compile with and without e.g. -gtoggle, and compare the final-insns dump |
2153915d AO |
868 | |
869 | fcompare-debug-second | |
5e471ea6 | 870 | Common Driver RejectNegative Var(flag_compare_debug) |
2153915d AO |
871 | Run only the second compilation of -fcompare-debug |
872 | ||
e692f276 RH |
873 | fcompare-elim |
874 | Common Report Var(flag_compare_elim_after_reload) Optimization | |
875 | Perform comparison elimination after register allocation has finished | |
876 | ||
b5b8b0ac AO |
877 | fconserve-stack |
878 | Common Var(flag_conserve_stack) Optimization | |
879 | Do not perform optimizations increasing noticeably stack usage | |
880 | ||
6ff3a151 | 881 | fcprop-registers |
c662432e | 882 | Common Report Var(flag_cprop_registers) Optimization |
f3fdaec4 | 883 | Perform a register copy-propagation optimization pass |
6ff3a151 | 884 | |
de32c0cb | 885 | fcrossjumping |
c662432e | 886 | Common Report Var(flag_crossjumping) Optimization |
f3fdaec4 | 887 | Perform cross-jumping optimization |
de32c0cb NB |
888 | |
889 | fcse-follow-jumps | |
c662432e | 890 | Common Report Var(flag_cse_follow_jumps) Optimization |
f3fdaec4 | 891 | When running CSE, follow jumps to their targets |
de32c0cb NB |
892 | |
893 | fcse-skip-blocks | |
2d2bd949 | 894 | Common Ignore |
5f39ad47 | 895 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 896 | |
c7463669 | 897 | fcx-limited-range |
5e46b0c6 | 898 | Common Report Var(flag_cx_limited_range) Optimization SetByCombined |
c7463669 RH |
899 | Omit range reduction step when performing complex division |
900 | ||
35085f76 JB |
901 | fcx-fortran-rules |
902 | Common Report Var(flag_cx_fortran_rules) Optimization | |
903 | Complex multiplication and division follow Fortran rules | |
904 | ||
6ff3a151 | 905 | fdata-sections |
c662432e | 906 | Common Report Var(flag_data_sections) Optimization |
f3fdaec4 | 907 | Place data items into their own section |
6ff3a151 | 908 | |
0a090f42 | 909 | fdbg-cnt-list |
299404a1 | 910 | Common Report Var(common_deferred_options) Defer |
0a090f42 SP |
911 | List all available debugging counters with their limits and counts. |
912 | ||
6fb5fa3c | 913 | fdbg-cnt= |
299404a1 | 914 | Common RejectNegative Joined Var(common_deferred_options) Defer |
f94e1d66 | 915 | -fdbg-cnt=<counter>:<limit>[,<counter>:<limit>,...] Set the debug counter limit. |
6fb5fa3c | 916 | |
c8aea42c | 917 | fdebug-prefix-map= |
299404a1 | 918 | Common Joined RejectNegative Var(common_deferred_options) Defer |
c8aea42c PB |
919 | Map one directory name to another in debug information |
920 | ||
76f9db36 JJ |
921 | fdebug-types-section |
922 | Common Report Var(flag_debug_types_section) Init(1) | |
923 | Output .debug_types section when using DWARF v4 debuginfo. | |
924 | ||
31b66477 KC |
925 | ; Nonzero for -fdefer-pop: don't pop args after each function call |
926 | ; instead save them up to pop many calls' args with one insns. | |
de32c0cb | 927 | fdefer-pop |
c662432e | 928 | Common Report Var(flag_defer_pop) Optimization |
f3fdaec4 | 929 | Defer popping functions args from stack until later |
de32c0cb NB |
930 | |
931 | fdelayed-branch | |
c662432e | 932 | Common Report Var(flag_delayed_branch) Optimization |
f3fdaec4 | 933 | Attempt to fill delay slots of branch instructions |
de32c0cb NB |
934 | |
935 | fdelete-null-pointer-checks | |
1ad2f450 | 936 | Common Report Var(flag_delete_null_pointer_checks) Init(1) Optimization |
f3fdaec4 | 937 | Delete useless null pointer checks |
de32c0cb | 938 | |
05842ff5 MJ |
939 | fdevirtualize |
940 | Common Report Var(flag_devirtualize) Optimization | |
941 | Try to convert virtual calls to direct ones. | |
942 | ||
de32c0cb | 943 | fdiagnostics-show-location= |
e6d4b984 | 944 | Common Joined RejectNegative Enum(diagnostic_prefixing_rule) |
cf03fd63 | 945 | -fdiagnostics-show-location=[once|every-line] How often to emit source location at the beginning of line-wrapped diagnostics |
de32c0cb | 946 | |
e6d4b984 JM |
947 | ; Required for these enum values. |
948 | SourceInclude | |
949 | pretty-print.h | |
950 | ||
951 | Enum | |
952 | Name(diagnostic_prefixing_rule) Type(int) | |
953 | ||
954 | EnumValue | |
955 | Enum(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE) | |
956 | ||
957 | EnumValue | |
958 | Enum(diagnostic_prefixing_rule) String(every-line) Value(DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE) | |
959 | ||
ccf08a6e | 960 | fdiagnostics-show-option |
c7d0de89 | 961 | Common Var(flag_diagnostics_show_option) Init(1) |
c85ce869 | 962 | Amend appropriate diagnostic messages with the command line option that controls them |
ccf08a6e | 963 | |
6de9cd9a | 964 | fdump- |
21bf1558 | 965 | Common Joined RejectNegative Var(common_deferred_options) Defer |
6de9cd9a DN |
966 | -fdump-<type> Dump various compiler internals to a file |
967 | ||
d1583032 JM |
968 | fdump-final-insns |
969 | Driver RejectNegative | |
970 | ||
2153915d AO |
971 | fdump-final-insns= |
972 | Common RejectNegative Joined Var(flag_dump_final_insns) | |
973 | -fdump-final-insns=filename Dump to filename the insns at the end of translation | |
974 | ||
c6a13190 ILT |
975 | fdump-go-spec= |
976 | Common RejectNegative Joined Var(flag_dump_go_spec) | |
977 | -fdump-go-spec=filename Write all declarations to file as Go code | |
978 | ||
24a7799e R |
979 | fdump-noaddr |
980 | Common Report Var(flag_dump_noaddr) | |
981 | Suppress output of addresses in debugging dumps | |
982 | ||
6ff3a151 | 983 | fdump-unnumbered |
e90afde6 | 984 | Common Report Var(flag_dump_unnumbered) |
24a7799e | 985 | Suppress output of instruction numbers, line number notes and addresses in debugging dumps |
6ff3a151 | 986 | |
2aa7c49b | 987 | fdump-unnumbered-links |
e90afde6 | 988 | Common Report Var(flag_dump_unnumbered_links) |
2aa7c49b AO |
989 | Suppress output of previous and next insn numbers in debugging dumps |
990 | ||
b5b8b0ac AO |
991 | fdwarf2-cfi-asm |
992 | Common Report Var(flag_dwarf2_cfi_asm) Init(HAVE_GAS_CFI_DIRECTIVE) | |
993 | Enable CFI tables via GAS assembler directives. | |
994 | ||
355866de | 995 | fearly-inlining |
c662432e | 996 | Common Report Var(flag_early_inlining) Init(1) Optimization |
355866de RG |
997 | Perform early inlining |
998 | ||
de32c0cb | 999 | feliminate-dwarf2-dups |
50431bc4 | 1000 | Common Report Var(flag_eliminate_dwarf2_dups) |
f3fdaec4 | 1001 | Perform DWARF2 duplicate elimination |
de32c0cb | 1002 | |
07ffa034 MJ |
1003 | fipa-sra |
1004 | Common Report Var(flag_ipa_sra) Init(0) Optimization | |
1005 | Perform interprocedural reduction of aggregates | |
1006 | ||
6a08f7b3 | 1007 | feliminate-unused-debug-symbols |
50431bc4 | 1008 | Common Report Var(flag_debug_only_used_symbols) |
f3fdaec4 | 1009 | Perform unused type elimination in debug info |
6a08f7b3 | 1010 | |
de32c0cb | 1011 | feliminate-unused-debug-types |
50431bc4 | 1012 | Common Report Var(flag_eliminate_unused_debug_types) Init(1) |
f3fdaec4 | 1013 | Perform unused type elimination in debug info |
de32c0cb | 1014 | |
e713adf6 | 1015 | femit-class-debug-always |
eae8e474 | 1016 | Common Report Var(flag_emit_class_debug_always) Init(0) |
e713adf6 CD |
1017 | Do not suppress C++ class debug information. |
1018 | ||
6ff3a151 | 1019 | fexceptions |
c662432e | 1020 | Common Report Var(flag_exceptions) Optimization |
f3fdaec4 | 1021 | Enable exception handling |
6ff3a151 | 1022 | |
de32c0cb | 1023 | fexpensive-optimizations |
c662432e | 1024 | Common Report Var(flag_expensive_optimizations) Optimization |
f3fdaec4 | 1025 | Perform a number of minor, expensive optimizations |
de32c0cb | 1026 | |
8ce94e44 | 1027 | fexcess-precision= |
e6d4b984 | 1028 | Common Joined RejectNegative Enum(excess_precision) Var(flag_excess_precision_cmdline) Init(EXCESS_PRECISION_DEFAULT) |
8ce94e44 JM |
1029 | -fexcess-precision=[fast|standard] Specify handling of excess floating-point precision |
1030 | ||
e6d4b984 JM |
1031 | Enum |
1032 | Name(excess_precision) Type(enum excess_precision) UnknownError(unknown excess precision style %qs) | |
1033 | ||
1034 | EnumValue | |
1035 | Enum(excess_precision) String(fast) Value(EXCESS_PRECISION_FAST) | |
1036 | ||
1037 | EnumValue | |
1038 | Enum(excess_precision) String(standard) Value(EXCESS_PRECISION_STANDARD) | |
1039 | ||
058de654 NB |
1040 | ffast-math |
1041 | Common | |
1042 | ||
6ff3a151 | 1043 | ffinite-math-only |
5e46b0c6 | 1044 | Common Report Var(flag_finite_math_only) Optimization SetByCombined |
f3fdaec4 | 1045 | Assume no NaNs or infinities are generated |
6ff3a151 | 1046 | |
058de654 | 1047 | ffixed- |
21bf1558 | 1048 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 1049 | -ffixed-<register> Mark <register> as being unavailable to the compiler |
058de654 | 1050 | |
de32c0cb | 1051 | ffloat-store |
c662432e | 1052 | Common Report Var(flag_float_store) Optimization |
31b66477 | 1053 | Don't allocate floats and doubles in extended-precision registers |
de32c0cb NB |
1054 | |
1055 | fforce-addr | |
2d2bd949 | 1056 | Common Ignore |
3de5e93a | 1057 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1058 | |
2ca2b607 SB |
1059 | fforward-propagate |
1060 | Common Report Var(flag_forward_propagate) Optimization | |
a52b023a PB |
1061 | Perform a forward propagation pass on RTL |
1062 | ||
16949072 | 1063 | ffp-contract= |
e6d4b984 | 1064 | Common Joined RejectNegative Enum(fp_contract_mode) Var(flag_fp_contract_mode) Init(FP_CONTRACT_FAST) |
16949072 RG |
1065 | -ffp-contract=[off|on|fast] Perform floating-point expression contraction. |
1066 | ||
e6d4b984 JM |
1067 | Enum |
1068 | Name(fp_contract_mode) Type(enum fp_contract_mode) UnknownError(unknown floating point contraction style %qs) | |
1069 | ||
1070 | EnumValue | |
1071 | Enum(fp_contract_mode) String(off) Value(FP_CONTRACT_OFF) | |
1072 | ||
1073 | ; Not implemented, fall back to conservative FP_CONTRACT_OFF. | |
1074 | EnumValue | |
1075 | Enum(fp_contract_mode) String(on) Value(FP_CONTRACT_OFF) | |
1076 | ||
1077 | EnumValue | |
1078 | Enum(fp_contract_mode) String(fast) Value(FP_CONTRACT_FAST) | |
1079 | ||
31b66477 KC |
1080 | ; Nonzero means don't put addresses of constant functions in registers. |
1081 | ; Used for compiling the Unix kernel, where strange substitutions are | |
1082 | ; done on the assembly output. | |
de32c0cb | 1083 | ffunction-cse |
50431bc4 | 1084 | Common Report Var(flag_no_function_cse,0) |
f3fdaec4 | 1085 | Allow function addresses to be held in registers |
de32c0cb | 1086 | |
6ff3a151 | 1087 | ffunction-sections |
50431bc4 | 1088 | Common Report Var(flag_function_sections) |
f3fdaec4 | 1089 | Place each function into its own section |
6ff3a151 | 1090 | |
de32c0cb | 1091 | fgcse |
c662432e | 1092 | Common Report Var(flag_gcse) Optimization |
f3fdaec4 | 1093 | Perform global common subexpression elimination |
de32c0cb NB |
1094 | |
1095 | fgcse-lm | |
c662432e | 1096 | Common Report Var(flag_gcse_lm) Init(1) Optimization |
f3fdaec4 | 1097 | Perform enhanced load motion during global common subexpression elimination |
de32c0cb NB |
1098 | |
1099 | fgcse-sm | |
c662432e | 1100 | Common Report Var(flag_gcse_sm) Init(0) Optimization |
f3fdaec4 | 1101 | Perform store motion after global common subexpression elimination |
de32c0cb | 1102 | |
f5f2e3cd | 1103 | fgcse-las |
c662432e | 1104 | Common Report Var(flag_gcse_las) Init(0) Optimization |
f9957958 MH |
1105 | Perform redundant load after store elimination in global common subexpression |
1106 | elimination | |
1107 | ||
1108 | fgcse-after-reload | |
c662432e | 1109 | Common Report Var(flag_gcse_after_reload) Optimization |
f9957958 | 1110 | Perform global common subexpression elimination after register allocation |
c85ce869 | 1111 | has finished |
f5f2e3cd | 1112 | |
d0a58904 | 1113 | ; This option is not documented yet as its semantics will change. |
f8bf9252 SP |
1114 | fgraphite |
1115 | Common Report Var(flag_graphite) | |
1116 | Enable in and out of Graphite representation | |
1117 | ||
204b560f SP |
1118 | fgraphite-identity |
1119 | Common Report Var(flag_graphite_identity) Optimization | |
1120 | Enable Graphite Identity transformation | |
1121 | ||
3cf0e270 SP |
1122 | floop-parallelize-all |
1123 | Common Report Var(flag_loop_parallelize_all) Optimization | |
204b560f SP |
1124 | Mark all loops as parallel |
1125 | ||
f8bf9252 SP |
1126 | floop-strip-mine |
1127 | Common Report Var(flag_loop_strip_mine) Optimization | |
1128 | Enable Loop Strip Mining transformation | |
1129 | ||
1130 | floop-interchange | |
1131 | Common Report Var(flag_loop_interchange) Optimization | |
1132 | Enable Loop Interchange transformation | |
1133 | ||
1134 | floop-block | |
1135 | Common Report Var(flag_loop_block) Optimization | |
1136 | Enable Loop Blocking transformation | |
1137 | ||
98af4c9f SP |
1138 | floop-flatten |
1139 | Common Report Var(flag_loop_flatten) Optimization | |
1140 | Enable Loop Flattening transformation | |
1141 | ||
6a78b724 DD |
1142 | fstrict-volatile-bitfields |
1143 | Common Report Var(flag_strict_volatile_bitfields) Init(-1) | |
1144 | Force bitfield accesses to match their type width | |
1145 | ||
6ff3a151 | 1146 | fguess-branch-probability |
c662432e | 1147 | Common Report Var(flag_guess_branch_prob) Optimization |
f3fdaec4 | 1148 | Enable guessing of branch probabilities |
6ff3a151 | 1149 | |
31b66477 KC |
1150 | ; Nonzero means ignore `#ident' directives. 0 means handle them. |
1151 | ; Generate position-independent code for executables if possible | |
1152 | ; On SVR4 targets, it also controls whether or not to emit a | |
1153 | ; string identifying the compiler. | |
6ff3a151 | 1154 | fident |
50431bc4 | 1155 | Common Report Var(flag_no_ident,0) |
f3fdaec4 | 1156 | Process #ident directives |
6ff3a151 | 1157 | |
de32c0cb | 1158 | fif-conversion |
c662432e | 1159 | Common Report Var(flag_if_conversion) Optimization |
f3fdaec4 | 1160 | Perform conversion of conditional jumps to branchless equivalents |
de32c0cb NB |
1161 | |
1162 | fif-conversion2 | |
c662432e | 1163 | Common Report Var(flag_if_conversion2) Optimization |
f3fdaec4 | 1164 | Perform conversion of conditional jumps to conditional execution |
de32c0cb | 1165 | |
384a5197 SP |
1166 | ftree-loop-if-convert |
1167 | Common Report Var(flag_tree_loop_if_convert) Init(-1) Optimization | |
1168 | Convert conditional jumps in innermost loops to branchless equivalents | |
1169 | ||
bd544141 SP |
1170 | ftree-loop-if-convert-stores |
1171 | Common Report Var(flag_tree_loop_if_convert_stores) Optimization | |
1172 | Also if-convert conditional jumps containing memory writes | |
1173 | ||
31b66477 KC |
1174 | ; -finhibit-size-directive inhibits output of .size for ELF. |
1175 | ; This is used only for compiling crtstuff.c, | |
1176 | ; and it may be extended to other effects | |
1177 | ; needed for crtstuff.c on other systems. | |
6ff3a151 | 1178 | finhibit-size-directive |
50431bc4 | 1179 | Common Report Var(flag_inhibit_size_directive) |
f3fdaec4 | 1180 | Do not generate .size directives |
6ff3a151 | 1181 | |
3e293154 MJ |
1182 | findirect-inlining |
1183 | Common Report Var(flag_indirect_inlining) | |
1184 | Perform indirect inlining | |
1185 | ||
31b66477 KC |
1186 | ; Nonzero means that functions declared `inline' will be treated |
1187 | ; as `static'. Prevents generation of zillions of copies of unused | |
1188 | ; static inline functions; instead, `inlines' are written out | |
1189 | ; only when actually used. Used in conjunction with -g. Also | |
1190 | ; does the right thing with #pragma interface. | |
de32c0cb | 1191 | finline |
e90acd93 | 1192 | Common Report Var(flag_no_inline,0) Init(0) |
f3fdaec4 | 1193 | Pay attention to the \"inline\" keyword |
de32c0cb | 1194 | |
4d4b8cb9 JH |
1195 | finline-small-functions |
1196 | Common Report Var(flag_inline_small_functions) Optimization | |
1197 | Integrate simple functions into their callers when code size is known to not growth | |
1198 | ||
de32c0cb | 1199 | finline-functions |
c662432e | 1200 | Common Report Var(flag_inline_functions) Optimization |
f3fdaec4 | 1201 | Integrate simple functions into their callers |
de32c0cb | 1202 | |
355866de | 1203 | finline-functions-called-once |
c662432e | 1204 | Common Report Var(flag_inline_functions_called_once) Init(1) Optimization |
355866de | 1205 | Integrate functions called once into their callers |
d63db217 | 1206 | |
d302c9d6 | 1207 | finline-limit- |
5de8299c | 1208 | Common RejectNegative Joined Alias(finline-limit=) |
d302c9d6 NB |
1209 | |
1210 | finline-limit= | |
1211 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1212 | -finline-limit=<number> Limit the size of inlined functions to <number> |
d302c9d6 | 1213 | |
6ff3a151 | 1214 | finstrument-functions |
50431bc4 | 1215 | Common Report Var(flag_instrument_function_entry_exit) |
f3fdaec4 | 1216 | Instrument function entry and exit with profiling calls |
6ff3a151 | 1217 | |
8d5a7d1f ILT |
1218 | finstrument-functions-exclude-function-list= |
1219 | Common RejectNegative Joined | |
1220 | -finstrument-functions-exclude-function-list=name,... Do not instrument listed functions | |
1221 | ||
1222 | finstrument-functions-exclude-file-list= | |
1223 | Common RejectNegative Joined | |
1224 | -finstrument-functions-exclude-file-list=filename,... Do not instrument functions listed in files | |
1225 | ||
d6e14e8f | 1226 | fipa-cp |
c662432e | 1227 | Common Report Var(flag_ipa_cp) Optimization |
d6e14e8f SB |
1228 | Perform Interprocedural constant propagation |
1229 | ||
5e45130d JH |
1230 | fipa-cp-clone |
1231 | Common Report Var(flag_ipa_cp_clone) Optimization | |
1232 | Perform cloning to make Interprocedural constant propagation stronger | |
1233 | ||
e65bb9be JH |
1234 | fipa-profile |
1235 | Common Report Var(flag_ipa_profile) Init(0) Optimization | |
1236 | Perform interprocedural profile propagation | |
ea900239 | 1237 | |
4cf4d6a3 | 1238 | fipa-pta |
c662432e | 1239 | Common Report Var(flag_ipa_pta) Init(0) Optimization |
4cf4d6a3 DB |
1240 | Perform interprocedural points-to analysis |
1241 | ||
e65bb9be JH |
1242 | fipa-pure-const |
1243 | Common Report Var(flag_ipa_pure_const) Init(0) Optimization | |
1244 | Discover pure and const functions | |
1245 | ||
ea900239 | 1246 | fipa-reference |
c662432e | 1247 | Common Report Var(flag_ipa_reference) Init(0) Optimization |
ea900239 DB |
1248 | Discover readonly and non addressable static variables |
1249 | ||
43d861a5 | 1250 | fipa-matrix-reorg |
6ae4be32 | 1251 | Common Report Var(flag_ipa_matrix_reorg) Optimization |
43d861a5 RL |
1252 | Perform matrix layout flattening and transposing based |
1253 | on profiling information. | |
1254 | ||
e1dc98b2 | 1255 | fipa-struct-reorg |
b8beb4d1 RG |
1256 | Common Ignore |
1257 | Does nothing. Preserved for backward compatibility. | |
e1dc98b2 | 1258 | |
058e97ec | 1259 | fira-algorithm= |
e6d4b984 | 1260 | Common Joined RejectNegative Enum(ira_algorithm) Var(flag_ira_algorithm) Init(IRA_ALGORITHM_CB) |
7db7ed3c VM |
1261 | -fira-algorithm=[CB|priority] Set the used IRA algorithm |
1262 | ||
e6d4b984 JM |
1263 | Enum |
1264 | Name(ira_algorithm) Type(enum ira_algorithm) UnknownError(unknown IRA algorithm %qs) | |
1265 | ||
1266 | EnumValue | |
1267 | Enum(ira_algorithm) String(CB) Value(IRA_ALGORITHM_CB) | |
1268 | ||
1269 | EnumValue | |
1270 | Enum(ira_algorithm) String(priority) Value(IRA_ALGORITHM_PRIORITY) | |
1271 | ||
7db7ed3c | 1272 | fira-region= |
e6d4b984 | 1273 | Common Joined RejectNegative Enum(ira_region) Var(flag_ira_region) Init(IRA_REGION_MIXED) |
7db7ed3c | 1274 | -fira-region=[one|all|mixed] Set regions for IRA |
058e97ec | 1275 | |
e6d4b984 JM |
1276 | Enum |
1277 | Name(ira_region) Type(enum ira_region) UnknownError(unknown IRA region %qs) | |
1278 | ||
1279 | EnumValue | |
1280 | Enum(ira_region) String(one) Value(IRA_REGION_ONE) | |
1281 | ||
1282 | EnumValue | |
1283 | Enum(ira_region) String(all) Value(IRA_REGION_ALL) | |
1284 | ||
1285 | EnumValue | |
1286 | Enum(ira_region) String(mixed) Value(IRA_REGION_MIXED) | |
1287 | ||
1833192f VM |
1288 | fira-loop-pressure |
1289 | Common Report Var(flag_ira_loop_pressure) | |
1290 | Use IRA based register pressure calculation | |
1291 | in RTL loop optimizations. | |
1292 | ||
058e97ec VM |
1293 | fira-share-save-slots |
1294 | Common Report Var(flag_ira_share_save_slots) Init(1) | |
1295 | Share slots for saving different hard registers. | |
1296 | ||
1297 | fira-share-spill-slots | |
1298 | Common Report Var(flag_ira_share_spill_slots) Init(1) | |
1299 | Share stack slots for spilled pseudo-registers. | |
1300 | ||
1301 | fira-verbose= | |
5498f011 | 1302 | Common RejectNegative Joined UInteger Var(flag_ira_verbose) Init(5) |
f94e1d66 | 1303 | -fira-verbose=<number> Control IRA's level of diagnostic messages. |
058e97ec | 1304 | |
8b11a64c | 1305 | fivopts |
c662432e | 1306 | Common Report Var(flag_ivopts) Init(1) Optimization |
8b11a64c ZD |
1307 | Optimize induction variables on trees |
1308 | ||
82c0180d | 1309 | fjump-tables |
c662432e | 1310 | Common Var(flag_jump_tables) Init(1) Optimization |
82c0180d JM |
1311 | Use jump tables for sufficiently large switch statements |
1312 | ||
de32c0cb | 1313 | fkeep-inline-functions |
50431bc4 | 1314 | Common Report Var(flag_keep_inline_functions) |
f3fdaec4 | 1315 | Generate code for functions even if they are fully inlined |
de32c0cb NB |
1316 | |
1317 | fkeep-static-consts | |
50431bc4 | 1318 | Common Report Var(flag_keep_static_consts) Init(1) |
f3fdaec4 | 1319 | Emit static const variables even if they are not used |
de32c0cb | 1320 | |
6ff3a151 | 1321 | fleading-underscore |
50431bc4 | 1322 | Common Report Var(flag_leading_underscore) Init(-1) |
f3fdaec4 | 1323 | Give external symbols a leading underscore |
6ff3a151 | 1324 | |
efa1cdf0 | 1325 | floop-optimize |
2d2bd949 | 1326 | Common Ignore |
c0220ea4 | 1327 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1328 | |
d7f09764 | 1329 | flto |
014d92e1 | 1330 | Common |
d7f09764 DN |
1331 | Enable link-time optimization. |
1332 | ||
014d92e1 JH |
1333 | flto= |
1334 | Common RejectNegative Joined Var(flag_lto) | |
1335 | Link-time optimization with number of parallel jobs or jobserver. | |
1336 | ||
852e4bd2 JH |
1337 | flto-partition=1to1 |
1338 | Common Var(flag_lto_partition_1to1) | |
1339 | Partition functions and vars at linktime based on object files they originate from | |
1340 | ||
1341 | flto-partition=balanced | |
1342 | Common Var(flag_lto_partition_balanced) | |
1343 | Partition functions and vars at linktime into approximately same sized buckets | |
1344 | ||
014d92e1 JH |
1345 | flto-partition=none |
1346 | Common Var(flag_lto_partition_none) | |
1347 | Disable partioning and streaming | |
1348 | ||
d7f09764 DN |
1349 | ; The initial value of -1 comes from Z_DEFAULT_COMPRESSION in zlib.h. |
1350 | flto-compression-level= | |
fcfbd84e | 1351 | Common Joined RejectNegative UInteger Var(flag_lto_compression_level) Init(-1) |
f94e1d66 | 1352 | -flto-compression-level=<number> Use zlib compression level <number> for IL |
d7f09764 DN |
1353 | |
1354 | flto-report | |
1355 | Common Report Var(flag_lto_report) Init(0) Optimization | |
1356 | Report various link-time optimization statistics | |
1357 | ||
6ff3a151 | 1358 | fmath-errno |
5e46b0c6 | 1359 | Common Report Var(flag_errno_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 1360 | Set errno after built-in math functions |
6ff3a151 | 1361 | |
3a789837 NF |
1362 | fmax-errors= |
1363 | Common Joined RejectNegative UInteger Var(flag_max_errors) | |
1364 | -fmax-errors=<number> Maximum number of errors to report | |
1365 | ||
6ff3a151 | 1366 | fmem-report |
50431bc4 | 1367 | Common Report Var(mem_report) |
f3fdaec4 | 1368 | Report on permanent memory allocation |
6ff3a151 | 1369 | |
31b66477 KC |
1370 | ; This will attempt to merge constant section constants, if 1 only |
1371 | ; string constants and constants from constant pool, if 2 also constant | |
1372 | ; variables. | |
6ff3a151 | 1373 | fmerge-all-constants |
c662432e | 1374 | Common Report Var(flag_merge_constants,2) Init(1) Optimization |
f3fdaec4 | 1375 | Attempt to merge identical constants and constant variables |
6ff3a151 NB |
1376 | |
1377 | fmerge-constants | |
f0036cca | 1378 | Common Report Var(flag_merge_constants,1) Optimization |
f3fdaec4 | 1379 | Attempt to merge identical constants across compilation units |
6ff3a151 | 1380 | |
28a08168 ILT |
1381 | fmerge-debug-strings |
1382 | Common Report Var(flag_merge_debug_strings) Init(1) | |
1383 | Attempt to merge identical debug strings across compilation units | |
1384 | ||
de32c0cb NB |
1385 | fmessage-length= |
1386 | Common RejectNegative Joined UInteger | |
cf03fd63 | 1387 | -fmessage-length=<number> Limit diagnostics to <number> characters per line. 0 suppresses line-wrapping |
de32c0cb | 1388 | |
e5626198 | 1389 | fmodulo-sched |
c662432e | 1390 | Common Report Var(flag_modulo_sched) Optimization |
e5626198 AZ |
1391 | Perform SMS based modulo scheduling before the first scheduling pass |
1392 | ||
517d76fa VY |
1393 | fmodulo-sched-allow-regmoves |
1394 | Common Report Var(flag_modulo_sched_allow_regmoves) | |
1395 | Perform SMS based modulo scheduling with register moves allowed | |
1396 | ||
5e962776 | 1397 | fmove-loop-invariants |
c662432e | 1398 | Common Report Var(flag_move_loop_invariants) Init(1) Optimization |
5e962776 ZD |
1399 | Move loop invariant computations out of loops |
1400 | ||
6de9cd9a | 1401 | fmudflap |
50431bc4 | 1402 | Common RejectNegative Report Var(flag_mudflap) |
c85ce869 | 1403 | Add mudflap bounds-checking instrumentation for single-threaded program |
6de9cd9a DN |
1404 | |
1405 | fmudflapth | |
f0036cca | 1406 | Common RejectNegative Report Var(flag_mudflap,2) |
c85ce869 | 1407 | Add mudflap bounds-checking instrumentation for multi-threaded program |
6de9cd9a DN |
1408 | |
1409 | fmudflapir | |
50431bc4 | 1410 | Common RejectNegative Report Var(flag_mudflap_ignore_reads) |
c85ce869 | 1411 | Ignore read operations when inserting mudflap instrumentation |
6de9cd9a | 1412 | |
6fb5fa3c | 1413 | fdce |
6ae4be32 | 1414 | Common Var(flag_dce) Init(1) Optimization |
6fb5fa3c DB |
1415 | Use the RTL dead code elimination pass |
1416 | ||
1417 | fdse | |
6ae4be32 | 1418 | Common Var(flag_dse) Init(1) Optimization |
6fb5fa3c DB |
1419 | Use the RTL dead store elimination pass |
1420 | ||
d72372e4 | 1421 | freschedule-modulo-scheduled-loops |
c662432e | 1422 | Common Report Var(flag_resched_modulo_sched) Optimization |
d72372e4 MH |
1423 | Enable/Disable the traditional scheduling in loops that already passed modulo scheduling |
1424 | ||
6ff3a151 | 1425 | fnon-call-exceptions |
c662432e | 1426 | Common Report Var(flag_non_call_exceptions) Optimization |
f3fdaec4 | 1427 | Support synchronous non-call exceptions |
6ff3a151 | 1428 | |
de32c0cb | 1429 | fomit-frame-pointer |
c662432e | 1430 | Common Report Var(flag_omit_frame_pointer) Optimization |
f3fdaec4 | 1431 | When possible do not generate stack frames |
de32c0cb | 1432 | |
6ff3a151 | 1433 | foptimize-register-move |
c662432e | 1434 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 1435 | Do the full register move optimization pass |
6ff3a151 | 1436 | |
de32c0cb | 1437 | foptimize-sibling-calls |
c662432e | 1438 | Common Report Var(flag_optimize_sibling_calls) Optimization |
f3fdaec4 | 1439 | Optimize sibling and tail recursive calls |
de32c0cb | 1440 | |
3e485f62 JH |
1441 | fpartial-inlining |
1442 | Common Report Var(flag_partial_inlining) | |
1443 | Perform partial inlining | |
1444 | ||
a5573239 JH |
1445 | fpre-ipa-mem-report |
1446 | Common Report Var(pre_ipa_mem_report) | |
1447 | Report on memory allocation before interprocedural optimization | |
1448 | ||
1449 | fpost-ipa-mem-report | |
1450 | Common Report Var(post_ipa_mem_report) | |
1451 | Report on memory allocation before interprocedural optimization | |
1452 | ||
6ff3a151 | 1453 | fpack-struct |
c662432e | 1454 | Common Report Var(flag_pack_struct) Optimization |
f3fdaec4 | 1455 | Pack structure members together without holes |
6ff3a151 | 1456 | |
467cecf3 | 1457 | fpack-struct= |
c662432e | 1458 | Common RejectNegative Joined UInteger Optimization |
467cecf3 JB |
1459 | -fpack-struct=<number> Set initial maximum structure member alignment |
1460 | ||
de32c0cb | 1461 | fpcc-struct-return |
5498f011 | 1462 | Common Report Var(flag_pcc_struct_return,1) Init(DEFAULT_PCC_STRUCT_RETURN) |
f3fdaec4 | 1463 | Return small aggregates in memory, not registers |
de32c0cb NB |
1464 | |
1465 | fpeel-loops | |
c662432e | 1466 | Common Report Var(flag_peel_loops) Optimization |
f3fdaec4 | 1467 | Perform loop peeling |
de32c0cb NB |
1468 | |
1469 | fpeephole | |
c662432e | 1470 | Common Report Var(flag_no_peephole,0) Optimization |
f3fdaec4 | 1471 | Enable machine specific peephole optimizations |
de32c0cb | 1472 | |
6ff3a151 | 1473 | fpeephole2 |
c662432e | 1474 | Common Report Var(flag_peephole2) Optimization |
f3fdaec4 | 1475 | Enable an RTL peephole pass before sched2 |
6ff3a151 | 1476 | |
31b66477 KC |
1477 | fPIC |
1478 | Common Report Var(flag_pic,2) | |
1479 | Generate position-independent code if possible (large mode) | |
1480 | ||
1481 | fPIE | |
1482 | Common Report Var(flag_pie,2) | |
1483 | Generate position-independent code for executables if possible (large mode) | |
1484 | ||
6ff3a151 | 1485 | fpic |
f0036cca | 1486 | Common Report Var(flag_pic,1) |
31b66477 | 1487 | Generate position-independent code if possible (small mode) |
6ff3a151 NB |
1488 | |
1489 | fpie | |
f0036cca | 1490 | Common Report Var(flag_pie,1) |
31b66477 | 1491 | Generate position-independent code for executables if possible (small mode) |
6ff3a151 | 1492 | |
68a607d8 | 1493 | fplugin= |
21bf1558 | 1494 | Common Joined RejectNegative Var(common_deferred_options) Defer |
68a607d8 DN |
1495 | Specify a plugin to load |
1496 | ||
1497 | fplugin-arg- | |
21bf1558 | 1498 | Common Joined RejectNegative Var(common_deferred_options) Defer |
f94e1d66 | 1499 | -fplugin-arg-<name>-<key>[=<value>] Specify argument <key>=<value> for plugin <name> |
68a607d8 | 1500 | |
bbc8a8dc | 1501 | fpredictive-commoning |
6ae4be32 | 1502 | Common Report Var(flag_predictive_commoning) Optimization |
bbc8a8dc ZD |
1503 | Run predictive commoning optimization. |
1504 | ||
de32c0cb | 1505 | fprefetch-loop-arrays |
1fbb509a | 1506 | Common Report Var(flag_prefetch_loop_arrays) Init(-1) Optimization |
f3fdaec4 | 1507 | Generate prefetch instructions, if available, for arrays in loops |
de32c0cb | 1508 | |
6ff3a151 | 1509 | fprofile |
50431bc4 | 1510 | Common Report Var(profile_flag) |
f3fdaec4 | 1511 | Enable basic program profiling code |
6ff3a151 NB |
1512 | |
1513 | fprofile-arcs | |
50431bc4 | 1514 | Common Report Var(profile_arc_flag) |
f3fdaec4 | 1515 | Insert arc-based program profiling code |
6ff3a151 | 1516 | |
2f908293 | 1517 | fprofile-dir= |
0576d21f | 1518 | Common Joined RejectNegative Var(profile_data_prefix) |
2f908293 SP |
1519 | Set the top-level directory for storing the profile data. |
1520 | The default is 'pwd'. | |
1521 | ||
52c76998 PY |
1522 | fprofile-correction |
1523 | Common Report Var(flag_profile_correction) | |
1524 | Enable correction of flow inconsistent profile data input | |
1525 | ||
a8a5f53a JH |
1526 | fprofile-generate |
1527 | Common | |
1528 | Enable common options for generating profile info for profile feedback directed optimizations | |
1529 | ||
2f908293 SP |
1530 | fprofile-generate= |
1531 | Common Joined RejectNegative | |
1532 | Enable common options for generating profile info for profile feedback directed optimizations, and set -fprofile-dir= | |
1533 | ||
a8a5f53a | 1534 | fprofile-use |
2f908293 | 1535 | Common Var(flag_profile_use) |
a8a5f53a JH |
1536 | Enable common options for performing profile feedback directed optimizations |
1537 | ||
2f908293 SP |
1538 | fprofile-use= |
1539 | Common Joined RejectNegative | |
1540 | Enable common options for performing profile feedback directed optimizations, and set -fprofile-dir= | |
1541 | ||
fca9dc00 | 1542 | fprofile-values |
50431bc4 | 1543 | Common Report Var(flag_profile_values) |
fca9dc00 ZD |
1544 | Insert code to profile values of expressions |
1545 | ||
de32c0cb | 1546 | frandom-seed |
299404a1 | 1547 | Common Var(common_deferred_options) Defer |
de32c0cb NB |
1548 | |
1549 | frandom-seed= | |
299404a1 | 1550 | Common Joined RejectNegative Var(common_deferred_options) Defer |
cf03fd63 | 1551 | -frandom-seed=<string> Make compile reproducible using <string> |
de32c0cb | 1552 | |
e0d9d0dd NC |
1553 | ; This switch causes the command line that was used to create an |
1554 | ; object file to be recorded into the object file. The exact format | |
1555 | ; of this recording is target and binary file format dependent. | |
1556 | ; It is related to the -fverbose-asm switch, but that switch only | |
1557 | ; records information in the assembler output file as comments, so | |
1558 | ; they never reach the object file. | |
1559 | frecord-gcc-switches | |
1560 | Common Report Var(flag_record_gcc_switches) | |
1561 | Record gcc command line switches in the object file. | |
1562 | ||
de32c0cb | 1563 | freg-struct-return |
f0036cca | 1564 | Common Report Var(flag_pcc_struct_return,0) Optimization |
f3fdaec4 | 1565 | Return small aggregates in registers |
de32c0cb | 1566 | |
6ff3a151 | 1567 | fregmove |
c662432e | 1568 | Common Report Var(flag_regmove) Optimization |
f3fdaec4 | 1569 | Enables a register move optimization |
6ff3a151 NB |
1570 | |
1571 | frename-registers | |
c662432e | 1572 | Common Report Var(flag_rename_registers) Init(2) Optimization |
f3fdaec4 | 1573 | Perform a register renaming optimization pass |
6ff3a151 NB |
1574 | |
1575 | freorder-blocks | |
c662432e | 1576 | Common Report Var(flag_reorder_blocks) Optimization |
f3fdaec4 | 1577 | Reorder basic blocks to improve code placement |
6ff3a151 | 1578 | |
750054a2 | 1579 | freorder-blocks-and-partition |
c662432e | 1580 | Common Report Var(flag_reorder_blocks_and_partition) Optimization |
750054a2 CT |
1581 | Reorder basic blocks and partition into hot and cold sections |
1582 | ||
6ff3a151 | 1583 | freorder-functions |
c662432e | 1584 | Common Report Var(flag_reorder_functions) Optimization |
f3fdaec4 | 1585 | Reorder functions to improve code placement |
6ff3a151 | 1586 | |
de32c0cb | 1587 | frerun-cse-after-loop |
3020190e | 1588 | Common Report Var(flag_rerun_cse_after_loop) Optimization |
f3fdaec4 | 1589 | Add a common subexpression elimination pass after loop optimizations |
de32c0cb | 1590 | |
efa1cdf0 | 1591 | frerun-loop-opt |
2d2bd949 | 1592 | Common Ignore |
c0220ea4 | 1593 | Does nothing. Preserved for backward compatibility. |
efa1cdf0 | 1594 | |
039c3d42 | 1595 | frounding-math |
5e46b0c6 | 1596 | Common Report Var(flag_rounding_math) Optimization SetByCombined |
039c3d42 RS |
1597 | Disable optimizations that assume default FP rounding behavior |
1598 | ||
6ff3a151 | 1599 | fsched-interblock |
c662432e | 1600 | Common Report Var(flag_schedule_interblock) Init(1) Optimization |
f3fdaec4 | 1601 | Enable scheduling across basic blocks |
6ff3a151 | 1602 | |
ce18efcb VM |
1603 | fsched-pressure |
1604 | Common Report Var(flag_sched_pressure) Init(0) Optimization | |
1605 | Enable register pressure sensitive insn scheduling | |
1606 | ||
6ff3a151 | 1607 | fsched-spec |
c662432e | 1608 | Common Report Var(flag_schedule_speculative) Init(1) Optimization |
f3fdaec4 | 1609 | Allow speculative motion of non-loads |
6ff3a151 NB |
1610 | |
1611 | fsched-spec-load | |
c662432e | 1612 | Common Report Var(flag_schedule_speculative_load) Optimization |
f3fdaec4 | 1613 | Allow speculative motion of some loads |
6ff3a151 NB |
1614 | |
1615 | fsched-spec-load-dangerous | |
c662432e | 1616 | Common Report Var(flag_schedule_speculative_load_dangerous) Optimization |
f3fdaec4 | 1617 | Allow speculative motion of more loads |
6ff3a151 | 1618 | |
de32c0cb | 1619 | fsched-verbose= |
299404a1 | 1620 | Common RejectNegative Joined UInteger Var(sched_verbose_param) |
cf03fd63 | 1621 | -fsched-verbose=<number> Set the verbosity level of the scheduler |
de32c0cb | 1622 | |
6ff3a151 | 1623 | fsched2-use-superblocks |
c662432e | 1624 | Common Report Var(flag_sched2_use_superblocks) Optimization |
f3fdaec4 | 1625 | If scheduling post reload, do superblock scheduling |
6ff3a151 NB |
1626 | |
1627 | fsched2-use-traces | |
2d2bd949 | 1628 | Common Ignore |
57257f0d | 1629 | Does nothing. Preserved for backward compatibility. |
6ff3a151 | 1630 | |
de32c0cb | 1631 | fschedule-insns |
c662432e | 1632 | Common Report Var(flag_schedule_insns) Optimization |
f3fdaec4 | 1633 | Reschedule instructions before register allocation |
de32c0cb NB |
1634 | |
1635 | fschedule-insns2 | |
c662432e | 1636 | Common Report Var(flag_schedule_insns_after_reload) Optimization |
f3fdaec4 | 1637 | Reschedule instructions after register allocation |
de32c0cb | 1638 | |
e855c69d AB |
1639 | ; This flag should be on when a target implements non-trivial |
1640 | ; scheduling hooks, maybe saving some information for its own sake. | |
1641 | ; On IA64, for example, this is used for correct bundling. | |
1642 | fselective-scheduling | |
1643 | Common Report Var(flag_selective_scheduling) Optimization | |
1644 | Schedule instructions using selective scheduling algorithm | |
1645 | ||
1646 | fselective-scheduling2 | |
1647 | Common Report Var(flag_selective_scheduling2) Optimization | |
1648 | Run selective scheduling after reload | |
1649 | ||
1650 | fsel-sched-pipelining | |
1651 | Common Report Var(flag_sel_sched_pipelining) Init(0) Optimization | |
1652 | Perform software pipelining of inner loops during selective scheduling | |
1653 | ||
1654 | fsel-sched-pipelining-outer-loops | |
1655 | Common Report Var(flag_sel_sched_pipelining_outer_loops) Init(0) Optimization | |
1656 | Perform software pipelining of outer loops during selective scheduling | |
1657 | ||
1658 | fsel-sched-reschedule-pipelined | |
1659 | Common Report Var(flag_sel_sched_reschedule_pipelined) Init(0) Optimization | |
1660 | Reschedule pipelined regions without pipelining | |
1661 | ||
31b66477 KC |
1662 | ; sched_stalled_insns means that insns can be moved prematurely from the queue |
1663 | ; of stalled insns into the ready list. | |
569fa502 | 1664 | fsched-stalled-insns |
ab442df7 | 1665 | Common Report Var(flag_sched_stalled_insns) Optimization UInteger |
569fa502 DN |
1666 | Allow premature scheduling of queued insns |
1667 | ||
1668 | fsched-stalled-insns= | |
c22cacf3 | 1669 | Common RejectNegative Joined UInteger |
4e994432 | 1670 | -fsched-stalled-insns=<number> Set number of queued insns that can be prematurely scheduled |
569fa502 | 1671 | |
31b66477 KC |
1672 | ; sched_stalled_insns_dep controls how many recently scheduled cycles will |
1673 | ; be examined for a dependency on a stalled insn that is candidate for | |
1674 | ; premature removal from the queue of stalled insns into the ready list (has | |
1675 | ; an effect only if the flag 'sched_stalled_insns' is set). | |
569fa502 | 1676 | fsched-stalled-insns-dep |
ab442df7 | 1677 | Common Report Var(flag_sched_stalled_insns_dep,1) Init(1) Optimization UInteger |
569fa502 DN |
1678 | Set dependence distance checking in premature scheduling of queued insns |
1679 | ||
1680 | fsched-stalled-insns-dep= | |
1681 | Common RejectNegative Joined UInteger | |
4e994432 | 1682 | -fsched-stalled-insns-dep=<number> Set dependence distance checking in premature scheduling of queued insns |
569fa502 | 1683 | |
ee4764a8 GS |
1684 | fsched-group-heuristic |
1685 | Common Report Var(flag_sched_group_heuristic) Init(1) Optimization | |
1686 | Enable the group heuristic in the scheduler | |
1687 | ||
1688 | fsched-critical-path-heuristic | |
1689 | Common Report Var(flag_sched_critical_path_heuristic) Init(1) Optimization | |
1690 | Enable the critical path heuristic in the scheduler | |
1691 | ||
1692 | fsched-spec-insn-heuristic | |
1693 | Common Report Var(flag_sched_spec_insn_heuristic) Init(1) Optimization | |
1694 | Enable the speculative instruction heuristic in the scheduler | |
1695 | ||
ee4764a8 GS |
1696 | fsched-rank-heuristic |
1697 | Common Report Var(flag_sched_rank_heuristic) Init(1) Optimization | |
1698 | Enable the rank heuristic in the scheduler | |
1699 | ||
1700 | fsched-last-insn-heuristic | |
1701 | Common Report Var(flag_sched_last_insn_heuristic) Init(1) Optimization | |
1702 | Enable the last instruction heuristic in the scheduler | |
1703 | ||
1704 | fsched-dep-count-heuristic | |
1705 | Common Report Var(flag_sched_dep_count_heuristic) Init(1) Optimization | |
1706 | Enable the dependent count heuristic in the scheduler | |
1707 | ||
aacd3885 | 1708 | fsection-anchors |
c662432e | 1709 | Common Report Var(flag_section_anchors) Optimization |
aacd3885 RS |
1710 | Access data in the same section from shared anchor points |
1711 | ||
8cd37d0b | 1712 | fsee |
2d2bd949 | 1713 | Common Ignore |
8393a9c8 | 1714 | Does nothing. Preserved for backward compatibility. |
8cd37d0b | 1715 | |
87a0ebfd ST |
1716 | fzee |
1717 | Common Report Var(flag_zee) Init(0) | |
1718 | Eliminate redundant zero extensions on targets that support implicit extensions. | |
1719 | ||
8abb6b22 | 1720 | fshow-column |
1cb42611 | 1721 | Common Report Var(flag_show_column) Init(1) |
e74fe492 | 1722 | Show column numbers in diagnostics, when available. Default on |
8abb6b22 | 1723 | |
6ff3a151 | 1724 | fsignaling-nans |
5e46b0c6 | 1725 | Common Report Var(flag_signaling_nans) Optimization SetByCombined |
f3fdaec4 | 1726 | Disable optimizations observable by IEEE signaling NaNs |
6ff3a151 | 1727 | |
db02da79 | 1728 | fsigned-zeros |
5e46b0c6 | 1729 | Common Report Var(flag_signed_zeros) Init(1) Optimization SetByCombined |
db02da79 RS |
1730 | Disable floating point optimizations that ignore the IEEE signedness of zero |
1731 | ||
6ff3a151 | 1732 | fsingle-precision-constant |
c662432e | 1733 | Common Report Var(flag_single_precision_constant) Optimization |
f3fdaec4 | 1734 | Convert floating point constants to single precision constants |
6ff3a151 | 1735 | |
113d659a | 1736 | fsplit-ivs-in-unroller |
c662432e | 1737 | Common Report Var(flag_split_ivs_in_unroller) Init(1) Optimization |
c85ce869 | 1738 | Split lifetimes of induction variables when loops are unrolled |
113d659a | 1739 | |
7458026b ILT |
1740 | fsplit-stack |
1741 | Common Report Var(flag_split_stack) Init(-1) | |
1742 | Generate discontiguous stack frames | |
1743 | ||
e53a16e7 | 1744 | fsplit-wide-types |
21af5cdf | 1745 | Common Report Var(flag_split_wide_types) Optimization |
e53a16e7 ILT |
1746 | Split wide types into independent registers |
1747 | ||
f37a4f14 | 1748 | fvariable-expansion-in-unroller |
c662432e | 1749 | Common Report Var(flag_variable_expansion_in_unroller) Optimization |
c85ce869 | 1750 | Apply variable expansion when loops are unrolled |
f37a4f14 | 1751 | |
b38f3813 EB |
1752 | fstack-check= |
1753 | Common Report RejectNegative Joined | |
1754 | -fstack-check=[no|generic|specific] Insert stack checking code into the program | |
1755 | ||
6ff3a151 | 1756 | fstack-check |
5de8299c | 1757 | Common Alias(fstack-check=, specific, no) |
b38f3813 | 1758 | Insert stack checking code into the program. Same as -fstack-check=specific |
6ff3a151 | 1759 | |
de32c0cb | 1760 | fstack-limit |
21bf1558 | 1761 | Common Var(common_deferred_options) Defer |
de32c0cb | 1762 | |
058de654 | 1763 | fstack-limit-register= |
21bf1558 | 1764 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 1765 | -fstack-limit-register=<register> Trap if the stack goes past <register> |
058de654 NB |
1766 | |
1767 | fstack-limit-symbol= | |
21bf1558 | 1768 | Common RejectNegative Joined Var(common_deferred_options) Defer |
cf03fd63 | 1769 | -fstack-limit-symbol=<name> Trap if the stack goes past symbol <name> |
058de654 | 1770 | |
7d69de61 RH |
1771 | fstack-protector |
1772 | Common Report Var(flag_stack_protect, 1) | |
1773 | Use propolice as a stack protection method | |
1774 | ||
1775 | fstack-protector-all | |
f0036cca | 1776 | Common Report RejectNegative Var(flag_stack_protect, 2) |
7d69de61 RH |
1777 | Use a stack protection method for every function |
1778 | ||
d3c12306 EB |
1779 | fstack-usage |
1780 | Common RejectNegative Var(flag_stack_usage) | |
1781 | Output stack usage information on a per-function basis | |
1782 | ||
de32c0cb | 1783 | fstrength-reduce |
2d2bd949 | 1784 | Common Ignore |
c0220ea4 | 1785 | Does nothing. Preserved for backward compatibility. |
de32c0cb | 1786 | |
31b66477 KC |
1787 | ; Nonzero if we should do (language-dependent) alias analysis. |
1788 | ; Typically, this analysis will assume that expressions of certain | |
1789 | ; types do not alias expressions of certain other types. Only used | |
1790 | ; if alias analysis (in general) is enabled. | |
6ff3a151 | 1791 | fstrict-aliasing |
c662432e | 1792 | Common Report Var(flag_strict_aliasing) Optimization |
f3fdaec4 | 1793 | Assume strict aliasing rules apply |
6ff3a151 | 1794 | |
eeef0e45 ILT |
1795 | fstrict-overflow |
1796 | Common Report Var(flag_strict_overflow) | |
1797 | Treat signed overflow as undefined | |
1798 | ||
de32c0cb | 1799 | fsyntax-only |
50431bc4 | 1800 | Common Report Var(flag_syntax_only) |
f3fdaec4 | 1801 | Check for syntax errors, then stop |
de32c0cb | 1802 | |
6ff3a151 | 1803 | ftest-coverage |
50431bc4 | 1804 | Common Report Var(flag_test_coverage) |
f3fdaec4 | 1805 | Create data files needed by \"gcov\" |
6ff3a151 | 1806 | |
de32c0cb | 1807 | fthread-jumps |
c662432e | 1808 | Common Report Var(flag_thread_jumps) Optimization |
f3fdaec4 | 1809 | Perform jump threading optimizations |
de32c0cb | 1810 | |
6ff3a151 | 1811 | ftime-report |
50431bc4 | 1812 | Common Report Var(time_report) |
f3fdaec4 | 1813 | Report the time taken by each compiler pass |
6ff3a151 | 1814 | |
058de654 | 1815 | ftls-model= |
e6d4b984 | 1816 | Common Joined RejectNegative Enum(tls_model) Var(flag_tls_default) Init(TLS_MODEL_GLOBAL_DYNAMIC) |
cf03fd63 | 1817 | -ftls-model=[global-dynamic|local-dynamic|initial-exec|local-exec] Set the default thread-local storage code generation model |
058de654 | 1818 | |
e6d4b984 JM |
1819 | Enum |
1820 | Name(tls_model) Type(enum tls_model) UnknownError(unknown TLS model %qs) | |
1821 | ||
1822 | EnumValue | |
1823 | Enum(tls_model) String(global-dynamic) Value(TLS_MODEL_GLOBAL_DYNAMIC) | |
1824 | ||
1825 | EnumValue | |
1826 | Enum(tls_model) String(local-dynamic) Value(TLS_MODEL_LOCAL_DYNAMIC) | |
1827 | ||
1828 | EnumValue | |
1829 | Enum(tls_model) String(initial-exec) Value(TLS_MODEL_INITIAL_EXEC) | |
1830 | ||
1831 | EnumValue | |
1832 | Enum(tls_model) String(local-exec) Value(TLS_MODEL_LOCAL_EXEC) | |
1833 | ||
474eccc6 | 1834 | ftoplevel-reorder |
d6cc6ec9 | 1835 | Common Report Var(flag_toplevel_reorder) Init(2) Optimization |
474eccc6 ILT |
1836 | Reorder top level functions, variables, and asms |
1837 | ||
de32c0cb | 1838 | ftracer |
50431bc4 | 1839 | Common Report Var(flag_tracer) |
f3fdaec4 | 1840 | Perform superblock formation via tail duplication |
de32c0cb | 1841 | |
31b66477 KC |
1842 | ; Zero means that floating-point math operations cannot generate a |
1843 | ; (user-visible) trap. This is the case, for example, in nonstop | |
1844 | ; IEEE 754 arithmetic. | |
6ff3a151 | 1845 | ftrapping-math |
5e46b0c6 | 1846 | Common Report Var(flag_trapping_math) Init(1) Optimization SetByCombined |
f3fdaec4 | 1847 | Assume floating-point operations can trap |
6ff3a151 NB |
1848 | |
1849 | ftrapv | |
c662432e | 1850 | Common Report Var(flag_trapv) Optimization |
f3fdaec4 | 1851 | Trap for signed overflow in addition, subtraction and multiplication |
6ff3a151 | 1852 | |
6de9cd9a | 1853 | ftree-ccp |
c662432e | 1854 | Common Report Var(flag_tree_ccp) Optimization |
6de9cd9a DN |
1855 | Enable SSA-CCP optimization on trees |
1856 | ||
0b4b14ac RG |
1857 | ftree-bit-ccp |
1858 | Common Report Var(flag_tree_bit_ccp) Optimization | |
1859 | Enable SSA-BIT-CCP optimization on trees | |
1860 | ||
0bca51f0 | 1861 | ftree-store-ccp |
2d2bd949 | 1862 | Common Ignore |
dce2b2f6 | 1863 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 1864 | |
6de9cd9a | 1865 | ftree-ch |
c662432e | 1866 | Common Report Var(flag_tree_ch) Optimization |
6de9cd9a DN |
1867 | Enable loop header copying on trees |
1868 | ||
6de9cd9a | 1869 | ftree-copyrename |
c662432e | 1870 | Common Report Var(flag_tree_copyrename) Optimization |
c85ce869 | 1871 | Replace SSA temporaries with better names in copies |
6de9cd9a | 1872 | |
0bca51f0 | 1873 | ftree-copy-prop |
c662432e | 1874 | Common Report Var(flag_tree_copy_prop) Optimization |
0bca51f0 DN |
1875 | Enable copy propagation on trees |
1876 | ||
1877 | ftree-store-copy-prop | |
2d2bd949 | 1878 | Common Ignore |
e9033855 | 1879 | Does nothing. Preserved for backward compatibility. |
0bca51f0 | 1880 | |
a5828d1e MM |
1881 | ftree-cselim |
1882 | Common Report Var(flag_tree_cselim) Init(2) Optimization | |
1883 | Transform condition stores into unconditional ones | |
1884 | ||
b6e99746 MJ |
1885 | ftree-switch-conversion |
1886 | Common Report Var(flag_tree_switch_conversion) Optimization | |
1887 | Perform conversions of switch initializations. | |
1888 | ||
6de9cd9a | 1889 | ftree-dce |
c662432e | 1890 | Common Report Var(flag_tree_dce) Optimization |
6de9cd9a DN |
1891 | Enable SSA dead code elimination optimization on trees |
1892 | ||
1893 | ftree-dominator-opts | |
c662432e | 1894 | Common Report Var(flag_tree_dom) Optimization |
6de9cd9a DN |
1895 | Enable dominator optimizations |
1896 | ||
1897 | ftree-dse | |
c662432e | 1898 | Common Report Var(flag_tree_dse) Optimization |
6de9cd9a DN |
1899 | Enable dead store elimination |
1900 | ||
248fc9f3 RG |
1901 | ftree-forwprop |
1902 | Common Report Var(flag_tree_forwprop) Init(1) Optimization | |
1903 | Enable forward propagation on trees | |
1904 | ||
ff2ad0f7 | 1905 | ftree-fre |
c662432e | 1906 | Common Report Var(flag_tree_fre) Optimization |
ff2ad0f7 DN |
1907 | Enable Full Redundancy Elimination (FRE) on trees |
1908 | ||
dea61d92 | 1909 | ftree-loop-distribution |
53ed2f0e | 1910 | Common Report Var(flag_tree_loop_distribution) Optimization |
dea61d92 SP |
1911 | Enable loop distribution on trees |
1912 | ||
20769d5e SP |
1913 | ftree-loop-distribute-patterns |
1914 | Common Report Var(flag_tree_loop_distribute_patterns) Optimization | |
1915 | Enable loop distribution for patterns transformed into a library call | |
1916 | ||
1b08d87d | 1917 | ftree-loop-im |
c662432e | 1918 | Common Report Var(flag_tree_loop_im) Init(1) Optimization |
a7e5372d ZD |
1919 | Enable loop invariant motion on trees |
1920 | ||
599eabdb | 1921 | ftree-loop-linear |
7633415c SP |
1922 | Common Alias(floop-interchange) |
1923 | Enable loop interchange transforms. Same as -floop-interchange | |
599eabdb | 1924 | |
1b08d87d | 1925 | ftree-loop-ivcanon |
c662432e | 1926 | Common Report Var(flag_tree_loop_ivcanon) Init(1) Optimization |
1b08d87d DB |
1927 | Create canonical induction variables in loops |
1928 | ||
c66b6c66 | 1929 | ftree-loop-optimize |
c662432e | 1930 | Common Report Var(flag_tree_loop_optimize) Init(1) Optimization |
c66b6c66 ZD |
1931 | Enable loop optimizations on tree level |
1932 | ||
5f40b3cb | 1933 | ftree-parallelize-loops= |
fcfbd84e | 1934 | Common Report Joined RejectNegative UInteger Var(flag_tree_parallelize_loops) Init(1) |
5f40b3cb ZD |
1935 | Enable automatic parallelization of loops |
1936 | ||
248fc9f3 RG |
1937 | ftree-phiprop |
1938 | Common Report Var(flag_tree_phiprop) Init(1) Optimization | |
1939 | Enable hoisting loads from conditional pointers. | |
1940 | ||
6de9cd9a | 1941 | ftree-pre |
c662432e | 1942 | Common Report Var(flag_tree_pre) Optimization |
6de9cd9a DN |
1943 | Enable SSA-PRE optimization on trees |
1944 | ||
248fc9f3 RG |
1945 | ftree-pta |
1946 | Common Report Var(flag_tree_pta) Init(1) Optimization | |
1947 | Perform function-local points-to analysis on trees. | |
1948 | ||
13c59415 UB |
1949 | ftree-reassoc |
1950 | Common Report Var(flag_tree_reassoc) Init(1) Optimization | |
1951 | Enable reassociation on tree level | |
1952 | ||
c75ab022 | 1953 | ftree-salias |
2d2bd949 | 1954 | Common Ignore |
1353232d | 1955 | Does nothing. Preserved for backward compatibility. |
c75ab022 | 1956 | |
fa555252 | 1957 | ftree-sink |
c662432e | 1958 | Common Report Var(flag_tree_sink) Optimization |
fa555252 DB |
1959 | Enable SSA code sinking on trees |
1960 | ||
6de9cd9a | 1961 | ftree-sra |
c662432e | 1962 | Common Report Var(flag_tree_sra) Optimization |
6de9cd9a DN |
1963 | Perform scalar replacement of aggregates |
1964 | ||
1965 | ftree-ter | |
3020190e | 1966 | Common Report Var(flag_tree_ter) Optimization |
6de9cd9a DN |
1967 | Replace temporary expressions in the SSA->normal pass |
1968 | ||
c662432e NC |
1969 | ftree-lrs |
1970 | Common Report Var(flag_tree_live_range_split) Optimization | |
1971 | Perform live range splitting during the SSA->normal pass | |
1972 | ||
0bca51f0 | 1973 | ftree-vrp |
c662432e | 1974 | Common Report Var(flag_tree_vrp) Init(0) Optimization |
0bca51f0 DN |
1975 | Perform Value Range Propagation on trees |
1976 | ||
de32c0cb | 1977 | funit-at-a-time |
d6cc6ec9 | 1978 | Common Report Var(flag_unit_at_a_time) Init(1) Optimization |
f3fdaec4 | 1979 | Compile whole compilation unit at a time |
de32c0cb NB |
1980 | |
1981 | funroll-loops | |
c662432e | 1982 | Common Report Var(flag_unroll_loops) Optimization |
f3fdaec4 | 1983 | Perform loop unrolling when iteration count is known |
de32c0cb NB |
1984 | |
1985 | funroll-all-loops | |
c662432e | 1986 | Common Report Var(flag_unroll_all_loops) Optimization |
f3fdaec4 | 1987 | Perform loop unrolling for all loops |
de32c0cb | 1988 | |
f9cc1a70 PB |
1989 | ; Nonzero means that loop optimizer may assume that the induction variables |
1990 | ; that control loops do not overflow and that the loops with nontrivial | |
1991 | ; exit condition are not infinite | |
1992 | funsafe-loop-optimizations | |
c662432e | 1993 | Common Report Var(flag_unsafe_loop_optimizations) Optimization |
f9cc1a70 PB |
1994 | Allow loop optimizations to assume that the loops behave in normal way |
1995 | ||
a1a82611 | 1996 | fassociative-math |
5e46b0c6 | 1997 | Common Report Var(flag_associative_math) SetByCombined |
a1a82611 RE |
1998 | Allow optimization for floating-point arithmetic which may change the |
1999 | result of the operation due to rounding. | |
2000 | ||
2001 | freciprocal-math | |
5e46b0c6 | 2002 | Common Report Var(flag_reciprocal_math) SetByCombined |
a1a82611 RE |
2003 | Same as -fassociative-math for expressions which include division. |
2004 | ||
31b66477 KC |
2005 | ; Nonzero means that unsafe floating-point math optimizations are allowed |
2006 | ; for the sake of speed. IEEE compliance is not guaranteed, and operations | |
2007 | ; are allowed to assume that their arguments and results are "normal" | |
2008 | ; (e.g., nonnegative for SQRT). | |
6ff3a151 | 2009 | funsafe-math-optimizations |
5e46b0c6 | 2010 | Common Report Var(flag_unsafe_math_optimizations) Optimization SetByCombined |
f3fdaec4 | 2011 | Allow math optimizations that may violate IEEE or ISO standards |
6ff3a151 | 2012 | |
de32c0cb | 2013 | funswitch-loops |
c662432e | 2014 | Common Report Var(flag_unswitch_loops) Optimization |
f3fdaec4 | 2015 | Perform loop unswitching |
de32c0cb | 2016 | |
6ff3a151 | 2017 | funwind-tables |
c662432e | 2018 | Common Report Var(flag_unwind_tables) Optimization |
f3fdaec4 | 2019 | Just generate unwind tables for exception handling |
6ff3a151 | 2020 | |
da18ea94 RAE |
2021 | fuse-linker-plugin |
2022 | Common Undocumented | |
2023 | ||
e90afde6 JM |
2024 | ; Positive if we should track variables, negative if we should run |
2025 | ; the var-tracking pass only to discard debug annotations, zero if | |
2026 | ; we're not to run it. When flag_var_tracking == 2 (AUTODETECT_VALUE) it | |
2027 | ; will be set according to optimize, debug_info_level and debug_hooks | |
2028 | ; in process_options (). | |
014a1138 | 2029 | fvar-tracking |
e90afde6 | 2030 | Common Report Var(flag_var_tracking) Init(2) Optimization |
014a1138 JZ |
2031 | Perform variable tracking |
2032 | ||
e90afde6 JM |
2033 | ; Positive if we should track variables at assignments, negative if |
2034 | ; we should run the var-tracking pass only to discard debug | |
2035 | ; annotations. When flag_var_tracking_assignments == | |
2036 | ; AUTODETECT_VALUE it will be set according to flag_var_tracking. | |
b5b8b0ac | 2037 | fvar-tracking-assignments |
e90afde6 | 2038 | Common Report Var(flag_var_tracking_assignments) Init(2) Optimization |
b5b8b0ac AO |
2039 | Perform variable tracking by annotating assignments |
2040 | ||
e90afde6 JM |
2041 | ; Nonzero if we should toggle flag_var_tracking_assignments after |
2042 | ; processing options and computing its default. */ | |
b5b8b0ac | 2043 | fvar-tracking-assignments-toggle |
e90afde6 | 2044 | Common Report Var(flag_var_tracking_assignments_toggle) Optimization |
b5b8b0ac AO |
2045 | Toggle -fvar-tracking-assignments |
2046 | ||
62760ffd CT |
2047 | fvar-tracking-uninit |
2048 | Common Report Var(flag_var_tracking_uninit) Optimization | |
2049 | Perform variable tracking and also tag variables that are uninitialized | |
2050 | ||
79fe1b3b | 2051 | ftree-vectorize |
c662432e | 2052 | Common Report Var(flag_tree_vectorize) Optimization |
79fe1b3b DN |
2053 | Enable loop vectorization on trees |
2054 | ||
a70d6342 IR |
2055 | ftree-slp-vectorize |
2056 | Common Report Var(flag_tree_slp_vectorize) Init(2) Optimization | |
2057 | Enable basic block vectorization (SLP) on trees | |
2058 | ||
792ed98b HJ |
2059 | fvect-cost-model |
2060 | Common Report Var(flag_vect_cost_model) Optimization | |
2061 | Enable use of cost model in vectorization | |
2062 | ||
c12cc930 | 2063 | ftree-vect-loop-version |
c662432e | 2064 | Common Report Var(flag_tree_vect_loop_version) Init(1) Optimization |
c12cc930 KB |
2065 | Enable loop versioning when doing loop vectorization on trees |
2066 | ||
c866976a | 2067 | ftree-vectorizer-verbose= |
7cd23050 | 2068 | Common RejectNegative Joined UInteger |
4e994432 | 2069 | -ftree-vectorizer-verbose=<number> Set the verbosity level of the vectorizer |
c866976a | 2070 | |
fbf798fc | 2071 | ftree-scev-cprop |
21af5cdf | 2072 | Common Report Var(flag_tree_scev_cprop) Init(1) Optimization |
fbf798fc DN |
2073 | Enable copy propagation of scalar-evolution information. |
2074 | ||
31b66477 KC |
2075 | ; -fverbose-asm causes extra commentary information to be produced in |
2076 | ; the generated assembly code (to make it more readable). This option | |
2077 | ; is generally only of use to those who actually need to read the | |
2078 | ; generated assembly code (perhaps while debugging the compiler itself). | |
2079 | ; -fno-verbose-asm, the default, causes the extra information | |
2080 | ; to not be added and is useful when comparing two assembler files. | |
6ff3a151 | 2081 | fverbose-asm |
50431bc4 | 2082 | Common Report Var(flag_verbose_asm) |
f3fdaec4 | 2083 | Add extra commentary to assembler output |
6ff3a151 | 2084 | |
d7afec4b | 2085 | fvisibility= |
e6d4b984 | 2086 | Common Joined RejectNegative Enum(symbol_visibility) Var(default_visibility) Init(VISIBILITY_DEFAULT) |
d7afec4b ND |
2087 | -fvisibility=[default|internal|hidden|protected] Set the default symbol visibility |
2088 | ||
e6d4b984 JM |
2089 | Enum |
2090 | Name(symbol_visibility) Type(enum symbol_visibility) UnknownError(unrecognized visibility value %qs) | |
2091 | ||
2092 | EnumValue | |
2093 | Enum(symbol_visibility) String(default) Value(VISIBILITY_DEFAULT) | |
2094 | ||
2095 | EnumValue | |
2096 | Enum(symbol_visibility) String(internal) Value(VISIBILITY_INTERNAL) | |
2097 | ||
2098 | EnumValue | |
2099 | Enum(symbol_visibility) String(hidden) Value(VISIBILITY_HIDDEN) | |
2100 | ||
2101 | EnumValue | |
2102 | Enum(symbol_visibility) String(protected) Value(VISIBILITY_PROTECTED) | |
d7afec4b | 2103 | |
fca9dc00 | 2104 | fvpt |
c662432e | 2105 | Common Report Var(flag_value_profile_transformations) Optimization |
fca9dc00 ZD |
2106 | Use expression value profiles in optimizations |
2107 | ||
62551c66 | 2108 | fweb |
c662432e | 2109 | Common Report Var(flag_web) Init(2) Optimization |
62551c66 JH |
2110 | Construct webs and split unrelated uses of single variable |
2111 | ||
c2699190 XDL |
2112 | ftree-builtin-call-dce |
2113 | Common Report Var(flag_tree_builtin_call_dce) Init(0) Optimization | |
2114 | Enable conditional dead code elimination for builtin calls | |
2115 | ||
ce91e74c | 2116 | fwhole-program |
c662432e | 2117 | Common Report Var(flag_whole_program) Init(0) Optimization |
ce91e74c JH |
2118 | Perform whole program optimizations |
2119 | ||
6ff3a151 | 2120 | fwrapv |
c662432e | 2121 | Common Report Var(flag_wrapv) Optimization |
f3fdaec4 | 2122 | Assume signed arithmetic overflow wraps around |
6ff3a151 | 2123 | |
6ff3a151 | 2124 | fzero-initialized-in-bss |
50431bc4 | 2125 | Common Report Var(flag_zero_initialized_in_bss) Init(1) |
f3fdaec4 | 2126 | Put zero initialized data in the bss section |
6ff3a151 | 2127 | |
e01cc6dc NB |
2128 | g |
2129 | Common JoinedOrMissing | |
df38ffef NB |
2130 | Generate debug information in default format |
2131 | ||
2132 | gcoff | |
53b2323e | 2133 | Common JoinedOrMissing Negative(gdwarf-) |
df38ffef NB |
2134 | Generate debug information in COFF format |
2135 | ||
53b2323e RH |
2136 | gdwarf- |
2137 | Common Joined UInteger Var(dwarf_version) Init(2) Negative(gstabs) | |
2138 | Generate debug information in DWARF v2 (or later) format | |
df38ffef NB |
2139 | |
2140 | ggdb | |
2141 | Common JoinedOrMissing | |
2142 | Generate debug information in default extended format | |
2143 | ||
2144 | gstabs | |
14c7833c | 2145 | Common JoinedOrMissing Negative(gstabs+) |
df38ffef NB |
2146 | Generate debug information in STABS format |
2147 | ||
2148 | gstabs+ | |
14c7833c | 2149 | Common JoinedOrMissing Negative(gvms) |
df38ffef NB |
2150 | Generate debug information in extended STABS format |
2151 | ||
65f753a0 | 2152 | gno-strict-dwarf |
047a3193 | 2153 | Common RejectNegative Var(dwarf_strict,0) Init(-1) |
65f753a0 JJ |
2154 | Emit DWARF additions beyond selected version |
2155 | ||
2156 | gstrict-dwarf | |
f0036cca | 2157 | Common Report RejectNegative Var(dwarf_strict,1) |
65f753a0 JJ |
2158 | Don't emit DWARF additions beyond selected version |
2159 | ||
2153915d AO |
2160 | gtoggle |
2161 | Common Report Var(flag_gtoggle) | |
2162 | Toggle debug information generation | |
2163 | ||
df38ffef | 2164 | gvms |
14c7833c | 2165 | Common JoinedOrMissing Negative(gxcoff) |
df38ffef NB |
2166 | Generate debug information in VMS format |
2167 | ||
2168 | gxcoff | |
14c7833c | 2169 | Common JoinedOrMissing Negative(gxcoff+) |
df38ffef NB |
2170 | Generate debug information in XCOFF format |
2171 | ||
2172 | gxcoff+ | |
14c7833c | 2173 | Common JoinedOrMissing Negative(gcoff) |
df38ffef | 2174 | Generate debug information in extended XCOFF format |
e01cc6dc | 2175 | |
6d721f67 JM |
2176 | h |
2177 | Driver Joined Separate | |
2178 | ||
4adbd5dd MK |
2179 | iplugindir= |
2180 | Common Joined Var(plugindir_string) Init(0) | |
2181 | -iplugindir=<dir> Set <dir> to be the default plugin directory | |
2182 | ||
603349bf JM |
2183 | l |
2184 | Driver Joined Separate | |
2185 | ||
dd9f93dc JM |
2186 | n |
2187 | Driver | |
2188 | ||
603349bf JM |
2189 | no-canonical-prefixes |
2190 | Driver | |
2191 | ||
d9d16a19 JM |
2192 | nodefaultlibs |
2193 | Driver | |
2194 | ||
bab79a40 JM |
2195 | nostartfiles |
2196 | Driver | |
2197 | ||
d9d16a19 JM |
2198 | nostdlib |
2199 | Driver | |
2200 | ||
d185d268 | 2201 | o |
d5478783 | 2202 | Common Driver Joined Separate Var(asm_file_name) MissingArgError(missing filename after %qs) |
cf03fd63 | 2203 | -o <file> Place output into <file> |
d185d268 NB |
2204 | |
2205 | p | |
50431bc4 | 2206 | Common Var(profile_flag) |
cf03fd63 | 2207 | Enable function profiling |
d185d268 | 2208 | |
603349bf JM |
2209 | pass-exit-codes |
2210 | Driver Var(pass_exit_codes) | |
2211 | ||
d185d268 | 2212 | pedantic |
50431bc4 | 2213 | Common Var(pedantic) |
cf03fd63 | 2214 | Issue warnings needed for strict compliance to the standard |
d185d268 NB |
2215 | |
2216 | pedantic-errors | |
d5478783 | 2217 | Common Var(flag_pedantic_errors) |
cf03fd63 | 2218 | Like -pedantic but issue them as errors |
d185d268 | 2219 | |
d9d16a19 JM |
2220 | pg |
2221 | Driver | |
2222 | ||
603349bf JM |
2223 | pipe |
2224 | Driver Var(use_pipes) | |
2225 | ||
2226 | print-file-name= | |
2227 | Driver JoinedOrMissing Var(print_file_name) | |
2228 | ||
2229 | print-libgcc-file-name | |
2230 | Driver | |
2231 | ||
2232 | print-multi-directory | |
2233 | Driver Var(print_multi_directory) | |
2234 | ||
2235 | print-multi-lib | |
2236 | Driver Var(print_multi_lib) | |
2237 | ||
2238 | print-multi-os-directory | |
2239 | Driver Var(print_multi_os_directory) | |
2240 | ||
2241 | print-prog-name= | |
2242 | Driver JoinedOrMissing Var(print_prog_name) | |
2243 | ||
2244 | print-search-dirs | |
2245 | Driver Var(print_search_dirs) | |
2246 | ||
2247 | print-sysroot | |
2248 | Driver Var(print_sysroot) | |
2249 | ||
2250 | print-sysroot-headers-suffix | |
2251 | Driver Var(print_sysroot_headers_suffix) | |
2252 | ||
d7b42618 | 2253 | quiet |
603349bf | 2254 | Common Var(quiet_flag) RejectDriver |
cf03fd63 | 2255 | Do not display functions compiled or elapsed time |
d7b42618 | 2256 | |
dd9f93dc JM |
2257 | r |
2258 | Driver | |
2259 | ||
2260 | s | |
2261 | Driver | |
2262 | ||
603349bf JM |
2263 | save-temps |
2264 | Driver | |
2265 | ||
2266 | save-temps= | |
2267 | Driver Joined | |
2268 | ||
dd9f93dc JM |
2269 | t |
2270 | Driver | |
2271 | ||
603349bf JM |
2272 | time |
2273 | Driver Var(report_times) | |
2274 | ||
2275 | time= | |
2276 | Driver JoinedOrMissing | |
2277 | ||
e200444e JM |
2278 | u |
2279 | Driver Joined Separate | |
2280 | ||
5642f5d5 JM |
2281 | undef |
2282 | Driver | |
2283 | ; C option, but driver must not handle as "-u ndef". | |
2284 | ||
603349bf | 2285 | v |
d5478783 JM |
2286 | Common Driver Var(verbose_flag) |
2287 | Enable verbose output | |
603349bf | 2288 | |
d185d268 | 2289 | version |
603349bf | 2290 | Common Var(version_flag) RejectDriver |
cf03fd63 | 2291 | Display the compiler's version |
d185d268 NB |
2292 | |
2293 | w | |
50431bc4 | 2294 | Common Var(inhibit_warnings) |
cf03fd63 | 2295 | Suppress warnings |
d185d268 | 2296 | |
603349bf JM |
2297 | wrapper |
2298 | Driver Separate Var(wrapper_string) | |
2299 | ||
2300 | x | |
2301 | Driver Joined Separate | |
2302 | ||
528dc603 L |
2303 | shared |
2304 | Common RejectNegative Negative(pie) | |
2305 | Create a shared library | |
2306 | ||
603349bf JM |
2307 | shared-libgcc |
2308 | Driver | |
2309 | ||
2310 | specs | |
5de8299c | 2311 | Driver Separate Alias(specs=) |
603349bf JM |
2312 | |
2313 | specs= | |
2314 | Driver Joined | |
2315 | ||
d9d16a19 JM |
2316 | static |
2317 | Driver | |
2318 | ||
603349bf JM |
2319 | static-libgcc |
2320 | Driver | |
2321 | ||
2322 | static-libgfortran | |
2323 | Driver | |
2324 | ; Documented for Fortran, but always accepted by driver. | |
2325 | ||
2326 | static-libstdc++ | |
2327 | Driver | |
2328 | ||
7a938933 ILT |
2329 | static-libgo |
2330 | Driver | |
2331 | ; Documented for Go, but always accepted by driver. | |
2332 | ||
e200444e JM |
2333 | symbolic |
2334 | Driver | |
2335 | ||
528dc603 L |
2336 | pie |
2337 | Common RejectNegative Negative(shared) | |
2338 | Create a position independent executable | |
2339 | ||
6d721f67 JM |
2340 | z |
2341 | Driver Joined Separate | |
2342 | ||
d7b42618 | 2343 | ; This comment is to ensure we retain the blank line above. |